5.01 goes final ...
 

Except the English only Pro version is not available. On the download sites I get:

"Not Found

The requested URL /software/MacOSX/10.5/OmniGrafflePro-5.0-English.dmg was not found on this server.

Additionally, a 404 Not Found error was encountered while trying to use an ErrorDocument to handle the request.

Apache Server at omnigroup.purestatic.com Port 80"

and

"Not Found

The requested URL /omnigroup/software/MacOSX/10.5/OmniGrafflePro-5.0-English.dmg was not found on this server.

Apache/2.0.55 (Ubuntu) DAV/2 PHP/5.1.2 mod_ssl/2.0.55 OpenSSL/0.9.8a Server at downloads.extremesims.com Port 80"

Maybe I'm too quick on the draw

Ah yes, looks like something went awry when pushing live to the website, it has been amended and the disk images download properly now.