Just checked now and the toolbar shows N/A for all sites. Is this a PR update or is it the death of PR?
Does it show nothing for all websites you visit or just your own sites? Google are phasing out PageRank - they're removing it from webmaster tools and several Google reps have said they don't want people to think of it as an authority factor any more.
to me it's ok few days ago Susan Moskwa (Google Webmaster Trends Analyst) said: http://www.google.com/support/forum/p/Webmasters/thread?tid=6a1d6250e26e9e48&hl=en#all so don't worry -)) TS, think it's only any troubles with Google toolbar or DC.