Pietje
I also have Spysweeper and received the notice regarding "csx.adservs.com"-I allowed the change and checked always take this action as it was my understanding that Spybot was adding "csx.adservs.com" to my restricted sites.
After seeing your post-I checked my restricted sites through IE explorer/properties/security and confirmed that both "csx.adservs.com" and "uvu-channel.com" are there.
I do not remember seeing the "uvu-channel.com" alert-but itmay have come up when I recently reinstalled spysweeper because of other problems.
The notice from Spysweeper does not say that Spybot is trying to add these to trusted sites-it says that Spybot is trying to change the settings for these sites. Spybot is changing the settings to "restricted sites".
I first ran across this type of conflict when installing Spywareblaster and it was adding "0190-dialers" to restricted site-both Spybot and Spysweeper came up with warnings.
Hope this helps.