thunderbird 3.0 beta accessibility issues

Using thunderbird 3 beta with jaws 9 i have the following issues:
1) i cannot  determine if a message has an attachment from the message list
2) i cannot  resize(/move columns  via keyboard: especially moving is 
important because people may  need to have some info (read/unread status 
etc) spoken before anything else,
3) the preview pane with he body of the message is  read only, bbut 
appears there is no  caret so  cannot scroll with  jaws.
4) to reach the preview pane  via tab key ihave to traverse a series of 
buttons;havent found a shortcut to go directly to the  body of the 
message and back again to the message list.

Are these known bugs?