Pretty much what the sbject line says. On my local machine GF appears in the plugin list, activates fine, etc. On the live site, same plugins, the GF doesn't appear in the list at all. Permissions set to 755.... all of the files are there and aren't zero bytes etc.
To be extra clear, this isn't a "I've activated and don't see the Forms menu" it's a "I go to Plugins > Installed and don't see GF at all" issue.