Its not a glitch at all and oblivion xp is designed to wortk with darn ui it asks what ut you have vanilla, darn ui and another on install in mod manger.
If it is "not a glitch", why are you even posting in the first place...
I was not talking about compatibility, but in fact prerequisites (beyond a UI of whatever kind). Have you [I now find myself asking bluntly] actually read the readme file that comes with Oblivion XP?
At least the bits about requirements, if not the whole thing?
That is what I was asking about.