how to have just some widgets just in the pages or post-pages?

Widget Logic does what you want.

thanks!

only problem is incompatibility with wp2.5… waiting for an update ??

Here’s a workaround: get your blog working in 2.3.3, then upgrade. In my case Widget Logic kept working.
A fresh install with 2.5 didn’t allow the plugin to do its magic…

i’ll wait… ??

thanks for the workaround, anyway ??