This is in 1.2.0-rc1.
The colapsable folder view doesn't work very well if
mailboxes don't exist at all of the folder branch
points. That is, if a.b and a.c exist, but not a,
then you don't get to see a +/- colapse point for a
like you should.
The fix is to append % to the LSUB command's 2nd
argument. This will report \NOSELECT nodes. I've
reported this before and it's been fixed in older
The attached file is the patch to fix it.