Since the new version of Nucleus supports custom table prefixes, all plugins making queries to database tables should be updated to work with these. Documentation on how make your (or someone else's) plugin support this is available here. Please add your plugin to this list if you made it Prefix proof. Thanks!
CSS : download latest
Chat: download latest
FancyText: download latest
(as is discussed in this forum thread)
These plugins in Nucleus “Extreme Edition” have been all modified to support table prefix and FancierURLs:
Info and download: http://hulan.info/blog/?itemid=135