Text in textfields randomly move

This happends in a quite heavy flashproject at work. And what’s even more interesting is that it doesn’t happend every time. It seem’s to be at random.
What happends is that text in textfields would move ~1px in X or Y. Have anyone else encountered this?

I thought that it was the layout code that sometimes was updated but no luck with that. And it is not that the text is getting reset either. But it seem’s to happend on mouse-input ( press / onRelease ).

This has been tested on different computers and it moved on all, nut in different ways.

So my question to you is, have anyone else experienced this? Is this a (un)known bug? Or am I doing something wrong? I tried google it and found nothing relevent…

Cheers!:beer: