We have upgraded the RoundCube Alpha and LiteCube Mobile themes to version 1.1. RoundCube includes functionality for inline display of PDF mail attachments, but Alpha Desktop and both mobile themes had problems handling this properly. The problems have now been fixed and PDF attachments can be viewed and scrolled. On the iPhone, use one finger to scroll the main page, and two fingers to scroll the pages of the displayed PDF.
We have also fixed the mail column widths in Alpha Desktop, so the subject line always fills all the available table space.