Description of problem:
YumEx - Bug Report on attempt to close program while refreshing output. 

Version-Release number of selected component (if applicable):
1.0.2

How reproducible:
First encounter.

Steps to Reproduce:
1. Open YumEx in X Server
2. Attempt to close while updating Output
3.
  
Actual results:
Component: yumex
Version: 1.0.2
Summary: TB3fa42680 threading.py:532:join:AssertionError: cannot join current thread

Traceback (most recent call last):
  File "/usr/lib/python2.4/atexit.py", line 24, in _run_exitfuncs
    func(*targs, **kargs)
  File "/usr/lib/python2.4/threading.py", line 632, in __exitfunc
    self._note("%s: waiting for other threads", self)
  File "/usr/lib/python2.4/threading.py", line 532, in join
    assert self is not currentThread(), "cannot join current thread"
AssertionError: cannot join current thread

Local variables in innermost frame:
self: <BackgroundRunner(Thread-4, started)>
timeout: None


Expected results:
Clean closing of program.

Additional info: