We know some only use it to remove the blue tint but it's also used to cheat. For that reason we have added a MD5Tool scan that kicks for it over the past days. This is not an action from EA, DICE or Even Balance (PunkBuster). They have nothing to do with the current MD5Tool kicks for various .cas files.
If you are being kicked for MD5Tool Mismatch and it lists a file named cas_50.cas or higher then you have to remove the file and should perform a repair install using Origin to repair any game files that may have been modified by the tweaker.
We are not banning for it so removing the files you are kicked for and repairing your game install should stop you from being kicked. Please note that just because a player is kicked for this doesn't mean they are cheating.
We are not kicking for BF3 Colour Tweaker released by Realmware.
Oct 8th, 2012
If you are being kicked for "MD5Tool Mismatch: Update\Patch\Data\cas_50.cas (len=2048)" and you have never used the BF3 Tweaker please note GGC-Stream sent a invalid MD5Tool scan to many BF3 servers that stream to them.
[10.08.2012 17:47:34] ->PBSV: PB UCON "ggc_126.96.36.199"@188.8.131.52:xxxx [pb_sv_md5tool a "" v "Update\Patch\Data\cas_50.cas" SZ157840 AT4096 LEN2048 E57AFBBACE8391DF703CC6BFFA66D27A]
[10.08.2012 17:47:34] ->PBSV: Added MD5Tool Entry: a "" v "Update\Patch\Data\cas_50.cas" SZ157840 AT4096 LEN2048 "E57AFBBACE8391DF703CC6BFFA66D27A"
That checks if the file created by the BF3 tweaker is on your computer and if it is not then you get kicked.
Finally if you are a server admin and are thinking about making your own MD5 Tool scans please note this warning:
WARNING: This is an advanced topic intended for experienced server admins who are comfortable with running PunkBuster-enabled game servers. Improper use of the MD5Tool Facility can result in inadvertently configuring PunkBuster to kick all players from the server.