Hi I also have the same problem, with if I go to magento connect in the admin it gives me a blank page. In the error log I had a error which told me it could not find some includes.
[Mon Jul 28 11:35:01 2008] [error] [client 184.108.40.206] PHP Warning: include_once() [<a href=’function.include’>function.include</a>]: Failed opening ‘Maged/Exception.php’ for inclusion (include_path=’/usr/local/lib/php’) in /myurl/magento/downloader/Maged/Controller.php on line 23, referer: https://myurl/index.php/admin/dashboard/
It appeared that the directory ref was not correct as the files to be included were in the same directory as the Controller.php . So I changed it to the correct without Maged.
The Magento Connect page then appears however it is still not quite correct and now I have different errors !
If I work it out I will post here.
Boardwalk Surf Shop