I actually found this info on another page, but this guy’s blog keeps crashing my browser.. so I copied and pasted the pertinent info cause I guarantee me or someone else will need this info sometime 
If you are using WordPress for your blog and maybe using 1and1.com for your server hosting, and then getting the following error:
Error 500 – Internal server error
An internal server error has occurred! Please try again later.
Then try the following two steps:
1. Create a new file in notepad and enter the following:
php_flag
register_globals off
register_globals = 0
memory_limit = 64M
Save this file as php.ini and upload it to your /wp-admin/ directory of your WordPress blog.
2. Next, create another file in notepad and enter the following:
AddType x-mapp-php5 .php
AddHandler x-mapp-php5 .php
Save this file as .htaccess and upload to the root directory of your WordPress blog. NOTE: if you already have an .htaccess file in your root directory DO NOT OVER WRITE IT; it may have code which your server needs. So, download it, add the above code to your original file, and then upload your new file.
Hope this helps you, it just fixed my problem.
