An unhandlable error occured aptdaemon

[Kush]

There seems to be a programming error in aptdaemon, the software that allows you to install/remove software and to perform other package management related tasks. Please report this error at http://launchpad.net/aptdaemon/+filebug and retry.

Details -
 Traceback (most recent call last):
  File "/usr/lib/python2.6/dist-packages/aptdaemon/worker.py", line 779, in simulate
    return self._simulate_helper(trans, status_path)
  File "/usr/lib/python2.6/dist-packages/aptdaemon/worker.py", line 958, in _simulate_helper
    return depends, status, self._cache.required_download, \
  File "/usr/lib/python2.6/dist-packages/apt/cache.py", line 218, in required_download
    pm.get_archives(fetcher, self._list, self._records)
SystemError: E:I wasn't able to locate file for the libavutil50 package. This might mean you need to manually fix this package.

This error occered when I was trying to download adobe flash player plugin for firefox. I just downloaded ubuntu 10.10 on my dell vostro 1000, and i am new to linux. any solutions for the error?

[Kush (kush)]

Ok I found out that this error occurs whenever I try to download and install anything.