diff -Naur Mattricks-0.7-orig/Mattricks/Commonwx.py Mattricks-0.7/Mattricks/Commonwx.py
--- Mattricks-0.7-orig/Mattricks/Commonwx.py	2004-04-15 06:20:07.000000000 -0600
+++ Mattricks-0.7/Mattricks/Commonwx.py	2007-12-04 21:05:15.000000000 -0600
@@ -17,6 +17,13 @@
 # along with this program; if not, write to the Free Software
 # Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 
+try:
+    import wxversion
+    wxversion.select("2.6")
+except Exception, e:
+    print >> sys.stderr, "%s: wxPython 2.6 not installed." %e
+    sys.exit(1)
+
 from wxPython.wx import *
 from Common import *