markus_vaeth

Okay, this is wierd.
The plugin activation triggered a change in my .htaccess file for another plugin concering the GZIP compression. This change in the .htaccess file (which I didn’t launched at all!) caused the 500 internal server error.

I edited the .htaccess file back to normal and now the site ist on again. Strange.

Now I have a clue. Obviously my plugin “math comment spam protection” doesn’t work with WP Version 3. I deactivated it and now have Akismet running.
Hope for the best.

@james
No, I’m not using Akismet because formerly I had big problems with it (accurate comments were filtered without even informing me).
But maybe it’s time to “plug it in” again :-(.

Hi,

I found out that it has something to do with WordPress’ function the_excerpt().

In the file wp_includes/formatting.php there’s a line:
‘$excerpt_length = 55;’
This determines the amount of words in the excerpt. If you now write a post with less than 55 words, WordPress apparently adds the urls of the links mentioned in the post (which is, IMHO, a bug!).

Anyway, I set this variable to 35 (my shortest post being longer than this) and Voila! Problem solved.