I've been making some simple WPF test apps to get used to XAML and testing them within NoesisGUI when I noticed an issue with a multi-line TextBox that accepts 'return'. The text on successive lines does not wrap, and instead renders off the panel. The first line does correctly wrap. Perhaps I've set something up wrong, but the WPF version works correctly.

https://www.dropbox.com/s/w9uwezrpgt84w ... Broken.png

When the scrollbar shows up, the text gets clipped (but doesn't wrap):
https://www.dropbox.com/s/98yli1klnlwrv ... ollbar.png

Here's the XAML:
https://www.dropbox.com/s/9nshp54do083f ... oData.xaml

Ok, I was able to reproduce it. We have some problem with the overflow in text boxes. We will try to fix it as soon as possible.

Thanks for reporting