Around the time 4.1 hit I suddenly started having target nameplate ONLY WHILE IN COMBAT somewhat transparent as opposed to be nice, bold, opaque. This gives me enormous problems in arena as I often instinctively double tab, thinking that I didn't switch target, when in fact 2nd tab was extra and had further changed the target.
I do not run any name plate mods although at one point of time or another I used to have overhead or tried another few. Actually, I do have Platebuffs installed but I tried disabling it or testing on toons that don't load that addon and the problem remains.
Does anyone else have a similar problem? And please, advices like delete wtf/cache/iface are not going to work - not after having a complete copy of WoW transfered from one hard drive to another, to third, from linux to windows, to another computer to yet another computer etc - for the past what... 6 years? Too many tiny settings would be lost and I wouldn't even be able to remember how i got them (some of the stuff wasn't addons but /console commands that were fixing one issue or another)
Screenshot here:
Addons I run are too numerous to list but have not been changed or new addons installed lately.