Acroread 7.0 won't print if ghostscript is emerged with the cjk USE flag. Emerging ghostscript-afpl (with cjk USE) will allow printing. Re-emerging ghostscript without cjk will also allow printing. I believe Acroread 5.0 had the same problem too.
Thanks for the bug report. This should be fixed in
ghostscript-7.07.1-r9. Please test and report back
if this works or not.
I've just emerged ghostscript-7.07.1-r9 and it works. I can finaly print with Acroread 7.0.
ditto.. emerged -r9 and acroread prints just fine with cjk USE flag enabled.
thanks for testing ;)