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User-Agent: Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.2.1) Gecko/20030115

Description of problem:
Between the "Channels" and "Packages Flagged to be Skipped" screen there is a
momentary "Progress Dialog" while it downloads the package list and headers.  If
you close (accidentally or on purpose because it is taking too long) the
"Progress Dialog" it displays the following traceback in the terminal and goes
ahead to the next screen.  This isn't deadly, but it probably shouldn't have
gone ahead to the next page.

TypeError: hide() takes no arguments (2 given)
Traceback (most recent call last):
  File "/usr/share/rhn/up2date_client/gui.py", line 1094, in onChannelsPageNext
    self.pList.run()
  File "/usr/share/rhn/up2date_client/packageList.py", line 81, in run
    self.progressCallback)
  File "/usr/share/rhn/up2date_client/rhnPackageInfo.py", line 151, in
availablePackageList
    progressCallback = progressCallback )
  File "/usr/share/rhn/up2date_client/rpcServer.py", line 112, in doCall
    ret = apply(method, args, kwargs)
  File "/usr/share/rhn/up2date_client/rpmSource.py", line 259, in listPackages
    msgCallback, progressCallback)
  File "/usr/share/rhn/up2date_client/rpmSource.py", line 583, in listPackages
    progressCallback(100,100)
  File "/usr/share/rhn/up2date_client/progress.py", line 50, in setProgress
    self.xml.get_widget("progressBar").set_fraction(i)
AttributeError: 'NoneType' object has no attribute 'set_fraction'
Traceback (most recent call last):
  File "/usr/share/rhn/up2date_client/gui.py", line 1138, in onSkippedPagePrepare
    maxlength = max(map(lambda x: len(x[0][0]), self.skipPkgList)) * 8
ValueError: min() or max() arg is an empty sequence

Version-Release number of selected component (if applicable):
up2date-3.1.1-1

How reproducible:
Always

Steps to Reproduce:
1. Close "Progress Dialog" before it finishes.
    
Actual Results:  
Goes to next step when it shouldn't.

Expected Results:  
Probably should go back to the last screen (re-enable the forward button too).