Thread:Extension talk:LiquidThreads/Edit/History/Delete on top of each other (paragraph inserted)

I just upgraded a Wiki to 1.21.1 and installed LiquidThreads 2.0 on top of that (so I don't know if the problem occurs with earlier mediawiki-versions).

The threads seem to work fine. The only problem seems to be that -tags seem to be inserted between the   and the Edit/History etc button. No idea at which level this happens: MediaWiki/the plugin/the Skin.

Any hints?