Problem: when I click in the box to write on someone's wall, the java/flash doesn't kick in.  Anything I type in the box is greyed out like "What's on your mind?" and won't post.  How can I fix this?  

Fix: seems the problem is with chrome or the adobe site, since adobe says chrome self updates and has the lastest flash and so does not offer a download option, and yet it's not true for many. I fixed by accessing fb w/firefox and then downloading flash from ff, for which adobe did allow me to. then chrome got fixed.