Raja, read this:
yes, workspaces theme need to be fine tuned for 2.x. I started some of the work (included in the file installable from edu.tw.o/mods).
I hope you are you using the latest version of the mod, as explained in:
And you might want to give a try to the further improvements by pingus (I haven't tried myself):
(see the attachments tab)
I wish we all worked against svn, so that we avoid having many files out there for aulawiki.... needing manual merges... But unluckily it's not the way yet. At the last TikiFestMadrid our mates from Madrid already got commit access and learned how and where to commit. I hope pingus does this too soon.