File links in Opera use Clean URLs by default

Issue Summary

Hi, I'm using WebFM, and it works great, except in opera file links seem not to work. Apparently they are normal html links instead of javascript links in other browsers. Firefox and IE downloads files ok, using links like
drupal/?q=webfm_send/50
while in opera clicking on the same link takes you to
drupal/webfm_send/50
which gives you an error because we don't use clean urls.
I think the script should check how it was invoked (with or without "?q=") and use the same syntax for links.