Infinity Ward's Robert Bowling has told us what to expect in Modern Warfare 3's next patch via a number of recent tweets. Apparently the main focus of the update will be to fix the spawning system and spawn logic, which should result in a slightly less chaotic experience.
In terms of nerfs, Bowling suggests that the FMG9, Striker and Type 95 will all receive a slight downgrade, while the shotguns will be buffed. Host disadvantage/lag compensation and the "Out Of Memory7" error will also be addressed.
The patch is expected to release by the end of the month.