Well, it has been 3 weeks since I took mine in and it hasn't done this since. It seems to have been fixed. They performed the following 2 TSBs:

04-36-017
04-40-007

However, it seems to have introduced a problem I was not having before. Now, when I drive it first thing in the morning, it shudders a little bit in 1st gear when I first take off. It feels like the tranny is slipping. It never did that before. Has anyone had this problem?
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Game systems I've owned:
1981 - Intellivision
1983 - Commodore 64
1998 - Sony Playstation
2002 - Nintendo GameCube