Site Admin load times

For some reason the site-admin section takes a lot of time before it loads into the browser, when accessed from the main index page. All other pages and sections load fast though, and mostly the sections within the site-admin pages as well, although it sometimes hangs there as well.

There /should/ not be a problem with the host, seeing as everything else on the server has no problem with loading times.

I am using Opera 8.52, identified as Mozilla if it is of relevance.

Thanks in advance!