I have another flower with this MacBook Pro... when I try to <code>cmd+tab</code> between applications - the tiltle on the title bar cchanges but he actual target application window isnt brought up.
There is a similar topic on askdifferent, (http://apple.stackexchange.com/questions/29705/cmdtab-switches-to-the-correct-space-but-doesnt-bring-app-up-to-front)
but I use spaces on my iMac and it all works, and on the notebook it doesn't...
Might you have any ideas in that respect maybe?