It should be ok as long as your site is still indexed at Google's SERP. Maybe you have to wait for next PR update. It happened to me last time, from PR 3 to 0. Then after the update, mine went to PR 5. I don't know why.
I cleaned up my site and I'm almost back now.... showing PR5 3 and 0 at different times, whereas previously I was consistently N/A. I didn't do anything special, just cleared up a long-standing duplicate content problem.
nope: Results 1 - 10 of about 509 for www.radiorevolt.com. (0.29 seconds) I dont know anything about duplicate content....
they work on 5 of Googles servers... it's like i got lost in limbo somewhere. All the links are still there and show up in Google Webmasters area (read above)
it didn't go back up for me.. not sure where you got that idea. still nothing and im still freaking out. It's been the better part of a month and revenue has been next to nil.