Tabbing issues with TinyMCE

[jkudish]

I am seeing different tabbing behaviours across different browsers with the visual editor/TinyMCE:

• Chrome 19: You can only tab into the editor from the title field when in visual mode once. After you focus out of TinyMCE and back into the title field, you cannot tab back into TinyMCE
• Firefox 12: You can't tab into the editor at all, tabbing from the title field, brings you to the publish box
• Safari 5.1.7: Tabbing in/out of the editor always works properly

This is especially problematic for blind users/accessibility. Would be great to standardize that behaviour across all browsers :)