I'm betting it was problems with GCC 4.2/4.3 and OpenMP.
While it is good to see UT3 on both Mac and Linux, and most likely I will buy it when it is available, and when I have the money to spare, the whole attitude from Epic toward the Linux delay leaves much to be desired... However, the single fact that ti is coming, and now there's some sort of "evidence" is indeed good news (for Linux gaming at large). I no longer like very much shooter games, but I'm sure I'll get a few hours of fun with this title (I know I like the game, I've played it on the PS3 already). Hopefully Epic will keep statistics on both, in-game OS tracking and client downloads statistics.
I host a podcast for a friend, and I keep archives of his episodes, including syncing them to my ipod (that's two downloads for one person right there, without going into the problems I had with my feeder re-downloading every podcast every week! (problems will arise forcing one to start the feed fresh)), coupled with the fact that most of them I have to download, repack, and reupload...
Then there's the fact that gaming mirrors will download and redistribute it themselves...
Client download statistics do not work. It may give a rough idea, but it's inherently and critically flawed.
More likely just too busy.
What do you find are the most time consuming things at LGP?
Beat around the bush. "Any tips to avoid the problem you had with UT3?" He can say what to avoid, without having to reveal exactly what the problem was.
If everyone expects a lot they will get disappointed. To overcome this, small pieces of information are leaked out to keep interest up. While at the same time not disappointing any of those people waiting for the next best thing since gnu sliced bread.