I am having trouble with whitespace handling in tags (1.1.2 & 1.2RC2 on Windows 2003 and Windows XP locally – and even on xwiki.org itself).
BTW, please refrain from making any test on xwiki.org. It's not a wiki for testing. As mentioned on the registration page if you wish to test stuff please use
http://playground.xwiki.org
Note that I've deleted your user account on xwiki.org this morning since I didn't know you and thought you were one of these people defacing xwiki.org every now and then. Feel free to recreate it if you want to contribute to xwiki's documentation :) Sorry about that.
Thanks
-Vincent