4.6 Sp1 HF3

Version:	Service Pack	HotFix	Date	Server	Seq	Client	Notes
4.6.1.30091	SP1	HF 3 KB2571168	July 2011		I	U

link to kb2571168

Appears to be both client and sequencer changes.

Additional links:

Kirk's translation: https://kirxblog.wordpress.com/2011/07/19/app-v-4-6-sp1-hf3-available-on-request/