WordPress MU

Ok here goes:

There are a few issues next to the known issues, which I won't mention because I get bored with those. The most issues will come directly from plugins, but maybe you can help me out in my quest to pin point those plugins and bugs.

1. When writing a post I get the following error:
Fatal error: Call to undefined function: _weak_escape()

2. I unregistered some widgets, so 'Editors' cannot add those widgets to their blogs. But with the new version they can add those inactive widgets, does anyone know a new solution?

3. I get the following error in the dashboard:
Warning: Compilation failed: characters with values > 255 are not yet supported in classes at offset 31 from the class-simplepie.php

4. Also the automatic update to 2.8.1 wouldn't work eventually I got a blank admin, I had to update it manually (don't know if I did something wrong, or it is a bug in the automatic update sequence)

Thnx in advance.

Ok it seems that issue 1 is somehow connected to the plugin Referrer Detector, but when I re-activate the plugin all seems to work well....

Ok here is an update:

I have updated wordpress MU to 2.8.2. First issue seems to be solved. Third issue is connected to the fact I am still using PHP 4 on my test server, my live server didn't have that problem at all. So folks if you see this error, upgrade your PHP!

Also the automatic update seems to work just fine.

So I want to thank the developers for the quick update (2.8.2)!