For me, everything (including visual effects and awn) seems to work, but it still gives this error.
'dpkg --configure -a' gives:
Setting up python-gmenu (2.30.0-0ubuntu4) ...
eval: 1: Syntax error: Unterminated quoted string
dpkg: error processing python-gmenu (--configure):
subprocess installed post-installation script returned error exit status 2
This error occurred during 10.04 upgrade (from 9.10)
See attachment for complete output.