You can fix this by creating a WDB folder in the /Cache subdirectory of your WoW-dir. So for example: d:\world of warcraft\Cache\WDB. That should fix it :p
GG blizzard and their uber QA process.
// update
Add this to a macro:
/script if not _clickfixed then __xps=PlaySound; function PlaySound(snd) if (snd~="igCharacterInfoTab") then __xps(snd); end end _clickfixed=1;end
and hit it once a login. No more nonstop clicking in raid.