bzr push: non-informative error message

[Alexander Belchenko]

I'm trying to use `bzr push` for pushing my files to USB Flash Stick 
Drive. First time I was not create on FlashDrive corresponding branch 
and run bzr push. Bzr prints error message that was very non-informative:

bzr: ERROR: bzrlib.errors.FileExists: <bzrlib.errors.FileExists instance 
at 0x00D2DD50>
   at E:\work\Python\bzr\bzr.dev\bzrlib\transport\local.py line 132
   in mkdir

I think error message should warn me about the fact that push location 
does not contain branch. But error FileExists when branch not exists??? 
It really weird.

Alexander