Not sure if anyone else has had this happen to them, but since the 2.2 ota, I have been unable to forse a desktop browser UAS. I've tried skyfire (my default), stock, and even downloaded miren...no avail, I cannot force web pages to load in desktop mode and some mobile optimized sites look like garbage compared to the regular version. I'm hoping this isn't related to the dalvik corruption that is draining others' batteries dry (my battery never lasted super long, but it goes down a bit faster now) as i really don't want to spend an afternoon trying to restore my phone to normal after doing a factory reset. Hope someone can chime in with a solution 
