We have just upgraded to 5.0.1 and it seems that some users cannot scroll the preview pane in the ajax client (no scrollbar appears, and in detached view, the message is truncated).
I have tried clearing cache, as well as choosing different themes, none of these work. There are some emails that come through that "work" with the scroll bar, but im not sure of the pattern: Some are plain text, some html, different senders and send times etc.
The scroll bar appears perfectly in firefox.
Any suggestions welcome!