Hi,
I'm in the same position as ldouble619. The admin page simply comes up blank, but without errors. Firebug shows me the following source
*<html>
<head></head>
<body></body>
</html>*
The strange thing is that I built this site two years ago for my wife and it's been working perfectly ever since. Then recently, this happened. I definitely haven't installed any mods and my hosting company swears that no files in the admin folder have changed. I've got an old 'test' instance which is working, so I doubt it's due to the hosting company doing an upgrade to one of the underlying applications either.
I know it's cheeky asking for help when I haven't upgraded to the latest version but I spent many hundreds of hours customising the site when I built it and the thought of upgrading to the latest is too daunting for words since I haven't worked on it for over two years.
Thanks for any suggestions you might have.
Sorry, should have mentioned that I'm on version 1.3.7.1 and PHP version 5.2.6
Possum.