Upgrade to WP 3.2/ and Server to php5 breaks theme? [closed]

Is your theme compatible with the new version of WP? May be that it uses a deprecated function name somewhere.

But I’ve had updates go wrong previously. The only thing that eventually sorted it out was to re-upload all the files of the new version using FTP, and overwriting what was there. Won’t have impact on your theme or other data, it just overwrites the core.