Problem with .htaccess file

Hi,

I need a Drupal guru please. About two weeks ago we launched a new website for our school, built on Drupal, hosted by Media Temple. Everything was working fine for about 2 weeks then suddenly the website returned a 500 internal server error after taking a long time to load. Having spoken to Media Temple they have said that the most likely cause is a caching problem linked to the .htaccess file, which is a known problem with Drupal. They have advised that we need a Drupal developer to rewrite some of the php in the .htaccess file to remedy the problem.

Now the problem we have is the guy who developed the website for us is now half way up a mountain on a push bike in Peru (seriously) and will be basically be otherwise engaged with said mountain and said push bike for the next 6 months and therefore unable to help.

If there is someone out there that can make head or tails of what I have just said and think they can remedy this problem for us, please get in touch with a quote and estimate of when you could have the issue resolved.

Many thanks in advance.

Jo