There is cups error log file (debug) before reinstalling foomatic:
I [29/May/2005:11:19:39 +0000] Full reload complete.
D [29/May/2005:11:19:39 +0000] StartListening: NumListeners=1
D [29/May/2005:11:19:39 +0000] StartListening: address=00000000 port=631
D [29/May/2005:11:19:39 +0000] ResumeListening: setting input bits...
D [29/May/2005:11:19:43 +0000] AcceptClient: 5 from localhost:631.
D [29/May/2005:11:19:43 +0000] ReadClient: 5 POST /printers/ HTTP/1.1
D [29/May/2005:11:19:43 +0000] ProcessIPPRequest: 5 status_code=1
D [29/May/2005:11:19:43 +0000] CloseClient: 5
D [29/May/2005:11:19:43 +0000] AcceptClient: 5 from localhost:631.
D [29/May/2005:11:19:43 +0000] ReadClient: 5 POST /classes/ HTTP/1.1
D [29/May/2005:11:19:43 +0000] ProcessIPPRequest: 5 status_code=1
D [29/May/2005:11:19:43 +0000] CloseClient: 5
D [29/May/2005:11:19:43 +0000] AcceptClient: 5 from localhost:631.
D [29/May/2005:11:19:43 +0000] ReadClient: 5 POST /printers/ HTTP/1.1
D [29/May/2005:11:19:43 +0000] ProcessIPPRequest: 5 status_code=1
D [29/May/2005:11:19:43 +0000] CloseClient: 5
D [29/May/2005:11:19:44 +0000] AcceptClient: 5 from localhost:631.
D [29/May/2005:11:19:44 +0000] CloseClient: 5
D [29/May/2005:11:19:44 +0000] AcceptClient: 5 from localhost:631.
D [29/May/2005:11:19:44 +0000] ReadClient: 5 POST /printers/ HTTP/1.1
D [29/May/2005:11:19:44 +0000] ProcessIPPRequest: 5 status_code=1
D [29/May/2005:11:19:44 +0000] CloseClient: 5
D [29/May/2005:11:19:44 +0000] AcceptClient: 5 from localhost:631.
D [29/May/2005:11:19:44 +0000] ReadClient: 5 POST /printers/ HTTP/1.1
D [29/May/2005:11:19:44 +0000] ProcessIPPRequest: 5 status_code=1
D [29/May/2005:11:19:44 +0000] CloseClient: 5
D [29/May/2005:11:19:44 +0000] AcceptClient: 5 from localhost:631.
D [29/May/2005:11:19:44 +0000] ReadClient: 5 POST /classes/ HTTP/1.1
D [29/May/2005:11:19:44 +0000] ProcessIPPRequest: 5 status_code=1
D [29/May/2005:11:19:44 +0000] CloseClient: 5
D [29/May/2005:11:19:44 +0000] AcceptClient: 5 from localhost:631.
D [29/May/2005:11:19:44 +0000] ReadClient: 5 POST /printers/ HTTP/1.1
D [29/May/2005:11:19:44 +0000] ProcessIPPRequest: 5 status_code=1
D [29/May/2005:11:19:44 +0000] CloseClient: 5
D [29/May/2005:11:19:44 +0000] AcceptClient: 5 from localhost:631.
D [29/May/2005:11:19:44 +0000] ReadClient: 5 POST /printers/ HTTP/1.1
D [29/May/2005:11:19:44 +0000] ProcessIPPRequest: 5 status_code=1
D [29/May/2005:11:19:44 +0000] CloseClient: 5
D [29/May/2005:11:19:44 +0000] AcceptClient: 5 from localhost:631.
D [29/May/2005:11:19:44 +0000] ReadClient: 5 POST / HTTP/1.1
D [29/May/2005:11:19:44 +0000] ProcessIPPRequest: 5 status_code=0
D [29/May/2005:11:19:44 +0000] ReadClient: 5 GET /printers/DeskJet.ppd HTTP/1.1
D [29/May/2005:11:19:44 +0000] SendFile: 5 file=7
D [29/May/2005:11:19:45 +0000] AcceptClient: 7 from localhost:631.
D [29/May/2005:11:19:45 +0000] ReadClient: 7 POST / HTTP/1.1
D [29/May/2005:11:19:45 +0000] ProcessIPPRequest: 7 status_code=1
D [29/May/2005:11:19:45 +0000] CloseClient: 7
D [29/May/2005:11:19:49 +0000] ReadClient: 5 POST / HTTP/1.1
D [29/May/2005:11:19:49 +0000] ProcessIPPRequest: 5 status_code=0
D [29/May/2005:11:19:49 +0000] ReadClient: 5 GET /printers/DeskJet.ppd HTTP/1.1
D [29/May/2005:11:19:49 +0000] SendFile: 5 file=7
D [29/May/2005:11:19:49 +0000] AcceptClient: 7 from localhost:631.
D [29/May/2005:11:19:49 +0000] ReadClient: 7 POST /printers/DeskJet HTTP/1.1
D [29/May/2005:11:19:49 +0000] print_job: auto-typing file...
D [29/May/2005:11:19:49 +0000] print_job: request file type is application/postscript.
D [29/May/2005:11:19:49 +0000] check_quotas: requesting-user-name = 'jakub'
D [29/May/2005:11:19:49 +0000] print_job: requesting-user-name = 'jakub'
D [29/May/2005:11:19:49 +0000] Adding default job-sheets values "none,none"...
I [29/May/2005:11:19:49 +0000] Adding start banner page "none" to job 29.
I [29/May/2005:11:19:49 +0000] Adding end banner page "none" to job 29.
I [29/May/2005:11:19:49 +0000] Job 29 queued on 'DeskJet' by 'jakub'.
D [29/May/2005:11:19:49 +0000] Job 29 hold_until = 0
D [29/May/2005:11:19:49 +0000] StartJob(29, 0x8095398)
D [29/May/2005:11:19:49 +0000] StartJob() id = 29, file = 0/1
D [29/May/2005:11:19:49 +0000] job-sheets=none,none
D [29/May/2005:11:19:49 +0000] banner_page = 0
D [29/May/2005:11:19:49 +0000] StartJob: argv = "DeskJet","29","jakub","KDE Print Test","1","multiple-document-handling=separate-documents-uncollated-copies orientation-requested=3","/var/spool/cups/d00029-001"
D [29/May/2005:11:19:49 +0000] StartJob: envp[0]="PATH=/usr/lib/cups/filter:/bin:/usr/bin"
D [29/May/2005:11:19:49 +0000] StartJob: envp[1]="SOFTWARE=CUPS/1.1"
D [29/May/2005:11:19:49 +0000] StartJob: envp[2]="USER=root"
D [29/May/2005:11:19:49 +0000] StartJob: envp[3]="CHARSET=iso-8859-2"
D [29/May/2005:11:19:49 +0000] StartJob: envp[4]="LANG=cs"
D [29/May/2005:11:19:49 +0000] StartJob: envp[5]="PPD=/etc/cups/ppd/DeskJet.ppd"
D [29/May/2005:11:19:49 +0000] StartJob: envp[6]="CUPS_SERVERROOT=/etc/cups"
D [29/May/2005:11:19:49 +0000] StartJob: envp[7]="RIP_MAX_CACHE=8m"
D [29/May/2005:11:19:49 +0000] StartJob: envp[8]="TMPDIR=/var/spool/cups/tmp"
D [29/May/2005:11:19:49 +0000] StartJob: envp[9]="CONTENT_TYPE=application/postscript"
D [29/May/2005:11:19:49 +0000] StartJob: envp[10]="DEVICE_URI=usb://HP/DeskJet%20930C?serial=ES06E180DGJJ"
D [29/May/2005:11:19:49 +0000] StartJob: envp[11]="PRINTER=DeskJet"
D [29/May/2005:11:19:49 +0000] StartJob: envp[12]="CUPS_DATADIR=/usr/share/cups"
D [29/May/2005:11:19:49 +0000] StartJob: envp[13]="CUPS_FONTPATH=/usr/share/cups/fonts"
D [29/May/2005:11:19:49 +0000] StartJob: envp[14]="CUPS_SERVER=localhost"
D [29/May/2005:11:19:49 +0000] StartJob: envp[15]="IPP_PORT=631"
D [29/May/2005:11:19:49 +0000] StartJob: statusfds = [ 8 9 ]
D [29/May/2005:11:19:49 +0000] StartJob: filterfds[1] = [ 10 -1 ]
D [29/May/2005:11:19:49 +0000] StartJob: filter = "/usr/lib/cups/filter/pstops"
D [29/May/2005:11:19:49 +0000] StartJob: filterfds[0] = [ 11 12 ]
D [29/May/2005:11:19:49 +0000] start_process("/usr/lib/cups/filter/pstops", 0xbffee650, 0xbffed9c0, 10, 12, 9)
I [29/May/2005:11:19:49 +0000] Started filter /usr/lib/cups/filter/pstops (PID 11234) for job 29.
D [29/May/2005:11:19:49 +0000] StartJob: filter = "/usr/lib/cups/filter/foomatic-rip"
D [29/May/2005:11:19:49 +0000] StartJob: filterfds[1] = [ 10 13 ]
D [29/May/2005:11:19:49 +0000] start_process("/usr/lib/cups/filter/foomatic-rip", 0xbffee650, 0xbffed9c0, 11, 13, 9)
I [29/May/2005:11:19:49 +0000] Started filter /usr/lib/cups/filter/foomatic-rip (PID 11235) for job 29.
D [29/May/2005:11:19:49 +0000] StartJob: backend = "/usr/lib/cups/backend/usb"
D [29/May/2005:11:19:49 +0000] StartJob: filterfds[0] = [ -1 11 ]
D [29/May/2005:11:19:49 +0000] start_process("/usr/lib/cups/backend/usb", 0xbffee650, 0xbffed9c0, 10, 11, 9)
I [29/May/2005:11:19:49 +0000] Started backend /usr/lib/cups/backend/usb (PID 11237) for job 29.
D [29/May/2005:11:19:49 +0000] ProcessIPPRequest: 7 status_code=0
E [29/May/2005:11:19:49 +0000] PID 11235 stopped with status 22!
D [29/May/2005:11:19:49 +0000] [Job 29] /usr/lib/cups/filter/foomatic-rip: není souborem ani adresářem
D [29/May/2005:11:19:49 +0000] CloseClient: 7
D [29/May/2005:11:19:49 +0000] [Job 29] Page = 612x792; 18,36 to 594,783
D [29/May/2005:11:19:49 +0000] [Job 29] slowcollate=0, slowduplex=0, sloworder=0
D [29/May/2005:11:19:49 +0000] [Job 29] 0 %%BoundingBox: 0 0 612 792
D [29/May/2005:11:19:49 +0000] [Job 29] 0 %%Pages: 1
D [29/May/2005:11:19:49 +0000] [Job 29] 0 %%LanguageLevel: 1
D [29/May/2005:11:19:49 +0000] [Job 29] 0 %%DocumentData: Clean7Bit
D [29/May/2005:11:19:49 +0000] [Job 29] 0 %%DocumentSuppliedResources: procset testprint/1.0
D [29/May/2005:11:19:49 +0000] [Job 29] 0 %%DocumentNeededResources: font Helvetica Helvetica-Bold Times-Roman
D [29/May/2005:11:19:49 +0000] [Job 29] 0 %%Creator: Michael Sweet, Easy Software Products
D [29/May/2005:11:19:49 +0000] [Job 29] 0 %%CreationDate: May 11, 1999
D [29/May/2005:11:19:49 +0000] [Job 29] 0 %%Title: Test Page
D [29/May/2005:11:19:49 +0000] [Job 29] 0 %%EndComments
D [29/May/2005:11:19:49 +0000] [Job 29] 0 %%BeginProlog
D [29/May/2005:11:19:49 +0000] [Job 29] 0 %%BeginResource procset testprint 1.1 0
D [29/May/2005:11:19:49 +0000] [Job 29] 0 %%EndResource
D [29/May/2005:11:19:49 +0000] [Job 29] 0 %%EndProlog
D [29/May/2005:11:19:49 +0000] [Job 29] 0 %%Page: 1 1
D [29/May/2005:11:19:49 +0000] [Job 29] 0 %%Page: 1 1
D [29/May/2005:11:19:49 +0000] [Job 29] pw = 576.0, pl = 747.0
D [29/May/2005:11:19:49 +0000] [Job 29] PageLeft = 18.0, PageRight = 594.0
D [29/May/2005:11:19:49 +0000] [Job 29] PageTop = 783.0, PageBottom = 36.0
D [29/May/2005:11:19:49 +0000] [Job 29] PageWidth = 612.0, PageLength = 792.0
D [29/May/2005:11:19:49 +0000] [Job 29] 0 %%EOF
D [29/May/2005:11:19:49 +0000] [Job 29] Saw EOF!
D [29/May/2005:11:19:49 +0000] [Job 29] Printer using device file "/dev/usb/lp0"...
D [29/May/2005:11:19:49 +0000] [Job 29] LPGETSTATUS returned a port status of 18...
D [29/May/2005:11:19:49 +0000] UpdateJob: job 29, file 0 is complete.
D [29/May/2005:11:19:49 +0000] CancelJob: id = 29
D [29/May/2005:11:19:49 +0000] StopJob: id = 29, force = 0
D [29/May/2005:11:19:49 +0000] StopJob: printer state is 3

No errors after reinstalling foomatic.