Hey Tweakster,
If you have any h1_nnnn (note the small h) style work units on any of your boxes then you'll have to get rid of them ASAP as you'll be wasting cycles. I'm using 4.19 as it works well for me (mostly :).) and it's a bit of a chore to get rid of the cancelled work, as there is no abort button.
See Bruce's posts and my questions over in the main thread on this and I've just posted there what I did to get things moving again. Hope this helps. The good thing is that Bruce has reset to 8 the daily limit and this has worked for me as all my boxes that were suffering from this are now back at 8 after being much lower.
Note: I'll continue during the next few days to reset the daily limits by hand for hosts that got h1_ workunits.

Gun Shy
)
I've again reset the quotas for all machines that got h1_ workunits. I'll do this at least a few times per day over the next few days.
Bruce