I'm using java 6-29 and tried adding the 64 bit version and tried installing java 7. I've also tried going back to java 6-25 but have had no luck.
I don't think its firefox 8.0 as I get the same issue with internet explorer 8 when I try it.
This only started maybe two or three weeks ago and I can't pinpoint anything else that might have changed.
Can anyone shed some light on the problem?