I have a possible solution to this problem. The following worked for me :
* Go into your ${HOME}/.mozilla-thunderbird/<profile> directory
* Move localstore.rdf to localstore.rdf.original
It appears that some of the screen sizing information is kept in this file. Moving the file worked for me, but it may be possible to excise the offending XML directly. I didn't try this, however.
I have a possible solution to this problem. The following worked for me : /.mozilla- thunderbird/ <profile> directory rdf.original
* Go into your ${HOME}
* Move localstore.rdf to localstore.
It appears that some of the screen sizing information is kept in this file. Moving the file worked for me, but it may be possible to excise the offending XML directly. I didn't try this, however.