- Added MF5_CANTSEEK flag to prevent seeker missiles from homing in on

certain actors and added an option to APowerInvisibility to set this
  flag when active.
- Added map specific automap backgrounds.
- Fixed: Voodoo dolls did not play a sound when dying.
- Added colorized error messages to DECORATE and made a few more error
  conditions that do not block further parsing not immediately abort.
- Made all errors in CreateNewActor not immediately fatal so that the
  rest of the DECORATE lump can be parsed normally to look for more errors.
- Fixed: Defining classes with the same name as their immediate base class
  was legal. It should not be allowed that a class has another one with the
  same name in its ancestry.
- Fixed: Formatting of the intermission screen on Heretic, Hexen and Strife
  was broken. Changed it to use WI_Drawpercent which does it properly and
  also allows showing percentage in these games now.
- Fixed: The MAPINFO parser ignored missing terminating braces of the last
  block in the file.

SVN r1425 (trunk)

src/p_mobj.cpp

@@ -1284,7 +1284,7 @@ bool P_SeekerMissile (AActor *actor, angle_t thresh, angle_t turnMax)
 	AActor *target;
 
 	target = actor->tracer;
-	if (target == NULL || actor->Speed == 0)
+	if (target == NULL || actor->Speed == 0 || (target->flags5 & MF5_CANTSEEK))
 	{
 		return false;
 	}