More trouble with Delicious...

For some time now, the delicious bookmark window - that always opened to the left of the Firefox screen for me before - is opening at the bottom, ( like so: )

Does anyone know this problem, and/or have an idea of how to solve it?

ETA: Oh, great. It's an incompatibility with the new version of the Tab Kit extension. *headdesk* But I need that extension too! Argh.