I've downloaded and installed all the recent packs, but for some reason when I try to join a server, some maps will stall loading when the "loading objects" bar is full, just before it goes to "lighting mission". Some will load fine, though. For example, WizTriv "delta" loads no problem, while Rooz "Alpine Island" stalls.

Get the Art Crazy Never Stopping Download Bar to see exactly what you are missing.

Got this for "Cloverleaf":

I looked in my modpack, and didn't see an irish eyes folder.
I'm sure I'm just doing something stupid, but I can't figure it out.

That's something that's not in the ModPack. Everybody had to download it in-game. You're not doing anything stupid. :)

Thats what the download bar is for. Instead of the blue bar just sitting there the download bar shows what you are loading and how much you have got left to go, basically you can now see that TT is loading stuff you have not got.

^^Oooohhh. That's a relief. Thank you very much.