Plugin breaks Domain Mapping or paths?

I had php 5.4 recently installed on my server and then upgraded to 1.25. After that my site broke! I get a error message from my server that says “Unable to serve this request. Site temporarily unavailable. Connection timed out – please try again.” When I deactivate the plugin the site works fine.

I have narrowed down what it could be, but have no idea how to fix it. When I activate this plugin it somehow effects my domain mapping I believe. My sites load fine when you enter “www.domain.com” but not when you enter “domain.com” without the www.

Also in my admin area sometimes I am directed to pages that look like this “subdomain.domain.com/wp-admin” instead of “domain.com/wp-admin” or “www.domain.com/wp-admin”. When that happens I get the time out error. If I re enter by hand the “subdomain.com/wp-admin” then it loads fine. So obviously there is an issue with domain mapping, my dns or wrong info in my .htaccess file. I have been playing around with this for 2 weeks and I can’t figure it out.

I’m not sure what the problem can be any thoughts?

http://ww.wp.xz.cn/plugins/threewp-broadcast/