Internal Server Error when adding a specific description to a board

[Burpee]

I found some very interesting behavior.

When adding a description to my Recycle bin, I wanted to give the following:

Only admins are able to delete posts from the recycle bin.

However, I receive the following error message in response to this:

Internal Server Error

The server encountered an internal error or misconfiguration and was unable to complete your request.
Please contact the server administrator to inform of the time the error occurred and of anything you might have done that may have caused the error.

More information about this error may be available in the server error log.

The solution to this problem, is to remove the text "delete posts" from the description. Now I can imagine that this might be something which has been put in place to avoid MySQL injections, but I see two problems with that:

• These settings are for administrators only, there is no  need to worry  about  MySQL injections.
• It's rather odd  that it would give an Internal Server Error.

I've been hearing reports of such error messages popping up on  other pages as well, but so far I haven't been able to find a good explanation for it. It might be the hosting company, as I have not selected this myself and I am unaware of their configuration. Could anybody perhaps shed some light on what might be the problem here?

[kat]

Might this be the server's "Mod security" thing, over-reacting? (As usual)