Re: CSS3PIE on text and textarea form field inputs?
We've had problems with input text fields reported before: http://github.com/lojjic/PIE/issues#issue/25
Does that ticket match what you're seeing? (I think the part about IE8 not working was likely just a z-index issue.) If not can you clarify the bugs you see?
And yes, this will most likely be fixed in a future release.