After installing module server becomes unusable

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What steps will reproduce the problem?
1. Install module and restart apache
2. Wait for a few minutes watching top
3.

What is the expected output? What do you see instead?
I expected server load to either remain the same or reduce.

What version of the product are you using (please check X-Mod-Pagespeed
header)?
0.9.0.0-128

On what operating system?
- Debian 5 64 bit, CentOS 5 32 and 64 bit

Which version of Apache?
- 2.2

Which MPM?
- prefork

Please provide any additional information below, especially a URL or an
HTML file that exhibits the problem.
- I installed this across seven servers, running CentOS 5 32 and 64 bit, and 
Debian 5 64 bit (all Xen guests).  In every single case, after a few minutes, 
the load shot up to ridiculous levels like 60 to 90 and there were hundreds of 
apache process.  In the end I had to uninstall from all servers.

Original issue reported on code.google.com by d...@zikula.org on 4 Nov 2010 at 5:05