Sorry about double-posting and more details
I'm very sorry I posted on two threads- I wasn't able to locate this thread (very silly, I know)....Won't do that again!
Anyway, the problem occurs both on the gnome terminal and on synaptic when I try to install a software package or install something like Java, or Aria. The error message I get in both cases is:
E: crossplatformui: subprocess installed post-installation script returned error exit status 2
I use the ubuntu for netbook remix version
2.6.31-20-generic #58-Ubuntu SMP Fri Mar 12 05:23:09 UTC 2010 i686 GNU/Linux
(got that off the terminal- hope it helps)