ZC 1.3.8a
HTTP Server: Microsoft-IIS/7.0
PHP Version: 5.2.5
Database: MySQL 5.0.91

I keep getting more than the occasional 500 error, several a day in fact. My site will be humming along fine but then I'll notice it beginning to bog down until finally I receive the 500 error.
I ran mysqlcheck and found nothing amiss there, so I'm wondering if a script is causing the hang up.

Could someone with firebug or wedev take a quick peak and tell me if there might be an issue with a script or two?
Tidy isn't showing me anything critical but I'd appreciate some fresh eyes and or opinions.
http://minu.me/2tc5

Thank you,
Stephen