I just remembered that and came back to post. If you go into the SuperUser app, then Settings. Scroll to the bottom and the "su binary" or similar. Tap it and let it download the most updated version. Good to go!
This didn't do anything on my phone, another ideas? I tried to dl from market also and no go either.
Update: So I went to rom manager and downloaded 2.3.1, older version and installed it and now its working fine for me.
Edited by ebidar, 26 October 2010 - 02:39 PM.