Action bar & ver. 5.02.01?
 

I see the action bar problem is being worked on, and that going back to .01 can fix it in the meantime. I must have skipped past that version in the post patch craziness, is it avail. for dload anywhere?

Which part of the action bar problem are you talking about? The 5.02.04 fixes the problem with switching bars while in combat. Some people are reporting issues with is graying out spells when they are still available, but I haven't be able to reproduce that yet.

Some of my buttons on my main bar are greyed out. It seems to only be an issue for my druid, my priest's bars seem fine.

Its not even every button on the bar, the first 3 are fine, the last 2 are ok as well. Unfortunately, those 5 middle buttons are ones that I need to not be perma-greyed out, as they're my biting/clawing/killing ones. I tried moving the buttons around on the bar, just to make sure it wasn't a skills/macro issue, but things that are fine in the #1 spot, grey out as soon as I drop them into the #5etc spot. I'm 99% sure it is just the main action bar doing. It was happening in bear and cat form, I didn't think to check in 'caster' form though.

I've gone back to 5.2.0 in the meantime.

Yeah... this is a known issue since 5.02.02 -- it's been posted about a few times now... I'm trying to resolve it and hope I can get a fix out tonight... no promise on that though.