If you are running Ubuntu 11.04 with Playonlinux version 4.11 and recently updated Ubuntu, specifically :
- python-wxversion to version 126.96.36.199-0ubuntu8.1(natty-updates)
- python-wxgtk2.8 to version 188.8.131.52-0ubuntu8.1(natty-updates)
you may have nun-functional Playonlinux apps on your desktop. Like I did.
To fix this problem just rollback to previous working version of these two packages i.e the 184.108.40.206-0ubuntu8 (natty).
To downgrade go to synaptic package manager click the package and then click CTRL-E to force the previous version for both packages.
Another fine example of newer doesn't always better.
keyword : playonlinux error don't won't start fix wxwidget