Now I've isolated the problem to the .htaccess file. When the GTranslate entries are put in, the script doesn't load and just shows a blank space. However, when the GTranslate entries are removed, the script (and page) loads perfectly - however this obviously prevents GTranslate from working.
Other than that, GTranslate works very well, but that script is kind of crucial. :\ Any help would be very much appreciated.