The issue is with Digpagerank.net - I also agree, prchecker.info's pr checker is indeed working. However, it's not that accurate at detecting PR updates due to the fact it only pulls one datacentres' result. I personally prefer Ezer.com's PR checker - as it produces results from several datacentres and even caches your old PR results
I've noticed this datacenter down stuff since Dec 07. i don't think an update is imminent necessarily.
As I have said a few times, around the end of the month/start of next month is when one is *due* by my calculations, and I stick by that, especially with what is happening, the same stuff that happens before every pr update... Stop checking ya sites tho, I don't expect the public pr to be updated for at least a few days.
Are all you fools using SmartPagerank or CheckPagerank.net to check your PR? They're both showing PR0 for ALL my sites - an indication that they are broken, considering my Google Toolbar still shows the correct values for all my domains.