[support] Got a bit of a problem from drush up

[Roger]

Had drupal 7.9 working, have the required modules and a bit of taxonomy 
completed
Just now, 8:30 pm, used drush up to update to drupal 7.10
now I get :


  Internal Server Error

The server encountered an internal error or misconfiguration and was 
unable to complete your request.
-------------

I changed nothing, just did the drush update which I have done previously.

Can someone please advise what has gone wrong and how I should fix the 
problem, I appreciate any help
thank you
Roger


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