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User-Agent: Mozilla/5.0 (X11; U; Linux i586; en-US; rv:1.5a) Gecko/20030801
Mozilla Firebird/0.6.1

Description of problem:
In short:

Traceback (most recent call last):
  File "/usr/bin/anaconda", line 1106, in ?
    intf.run(id, dispatch, configFileData)
  File "/usr/src/build/309579-i386/install//usr/lib/anaconda/text.py", line 451,
in run
TypeError: __call__() takes exactly 2 arguments (4 given)

Full debug log is attached

How reproducible:
Always

Steps to Reproduce:
Boot (using boot.iso, if that matters.), answer the questions, and then wait
while it's building the list of packages to install/resolving dependencies/etc.