First off... Iv used all three im clients, and i love palringo the best...
Second off, there is a mild volume fix, but its for the sprint version, so you will
have to wait for one for your phone...
as for the home screen thing, mine also does that but like once a day... so i just ignore it... i use the home screen on my mogul to keep the home screen minimal and save ram... when i go to the touch i will molest my ram with my home screen
so really all the help i can give is, palringo rules, and signing up was super simple...
Try a diff browser??? i dont get what you mean by you can sign up...