OK, it was going nice and smooth the last few days - keeping max 4-5 jobs in queue. It just happened then.
I was in a techy mood, so looked up my anti virus logs - as I remember my AV giving probs with roland Onsupport not long ago - the fix was to make a rule exclusion for it - it thought the mail it was sending out was spam.
In this case - this is the log in my AV report...
11/03/2011 12:04:35 PM Would be blocked by Access Protection rule (rule is currently not enforced) C:\Program Files\Roland VersaWorks\VersaWorks\Roland VersaWorks.exe C:\Documents and Settings\***\Local Settings\Temporary Internet Files\Content.IE5\index.dat Anti-virus Maximum Protection

rotect cached files from password and email address stealers Action blocked : Read
It says "rule is not enforced", but don't know even what the hell VW is trying to do with the index.dat file? Any idea anyone?
Anyways, I have excluded Roland VersaWorks.exe from the rule just in case...
Interesting to see if it fixes it.