I actually use PyQT but I can replicate the issue using QT aswell.
Basically when I navigate to a flash website where I have to input text using QWebView it doubles all my key presses.
This only happens in flash 10.1, it does not happen when I use the flash 10.0 or lower plugin (I have tested flash 9 aswell).
The bug, as far as I can tell happens in both Mac OS 10.5 and 10.6, however I have only tested Intel machines not PPC ones, and I have not tested Windows or Linux.
I initially thought it was something I was doing however the Arora browser also has the same issue using the flash 10.1 plugin on a Mac, which made me think it was something up with QT. The other possibility is that it is a flash bug, however, I do not get the issue using Safari.
The simplest QWebView project with an URL indicating a flash form highlights the issue for me so it is very easily recreateable, I can provide an example project if needed.
Any help would be much appreciated even if its just to say yes it happens for me too!
Thanks,