WowAce

What steps will reproduce the problem?
1. Invite any player to a party
2. Convert to raid
3. Enter combat (ie: begin attacking a training dummy)
4. Invite a second player to the raid
5. Exit combat

What is the expected output?
1. No net change in raid frames during combat
2. New entry should be appended to existing raid frames once combat ends

What do you see instead?
4. Existing, possibly random raid frame is "corrupted" for each new member:  Frame color is overlaid with that of the new class, and mana/energy bar is drawn.  Text rarely is overlaid (ie: name).  Have seen last raid name, target, targetoftarget, and focus "corrupted" in this fashion.

What version of the product are you using?
v3.2.9

Please provide any additional information below.
-Players joining during party do NOT corrupt existing frames;  they do not appear once combat ends, though.

Frame layout for attachment:
Focus in top-left
Party is left aligned
Target is top-middle
Player is top-right

Currently no target.  Screen-shot taken after new player (hunter) joined party during combat

The frame "corrupted" seems to be related to the player's position in raid frames (id?). If player joins as first member of party 1, then the first raid entry is corrupted, and so on. Can't find a direct / exact cause, but there appears to be a correlation.

Via setting "Raid -> Other -> Show 5-man raid as a party", frames can be "fixed" by: -exiting combat -moving player from group 1 to group 2..8 -OR, moving all 5 players in raid to group 1

obviously will not work on raids with more than 5 members; interesting that frame reset will fix the problem without a /reloadui, though. Perhaps this problem is related to an internal indexing issue?