Contributor Permission

[Andrew]

http://support.microsoft.com/kb/930090/en-us

is this fixed yet?

I still able to delete other users' file through network while having only
contributor sharing permission with all patches installed.

 

[Jeffrey Randow]

Not at this time..

The KB article will link to a hotfix (or tell you to call support for
it) or whether or not it will be in the next service pack...