Double Slashes in URL

[ianmh]

I have a php app that works fine on my home apache server and works fine on my hosts server with the exception of subdomains. As soon as I have mysubdomain.mydomain.com all my urls get mysubdomain.mydomain.com//aphpfile.php. If I code the links to be absolute /aphpfile.php they work fine on the subdomain, but then they will not work on the normal domain anymore because they are set up as relative. Is there an htaccess setting I should know about or something?

Thanks