I'm creating a new solution in FileMaker 13 WebDirect using the "Silver" theme. In FileMaker, Silver Theme Tab Objects default to Helvetica 10 point text for the tab labels. In every browser I've tried - Safari, Chrome, Firefox on the Mac, Chrome and IE on Windows - the label text appears cutoff.
Setting the default font to Arial or Verdana also shows the text still cutoff. Modifying the Style to make the font smaller helps slightly but the text is still cutoff and harder to read because it's small. Other Themes appear similarly cutoff so it's does not appear to be specific to "Silver".