I've zonked my v4.master page by putting a bad link in a ScriptLink tag. All my pages, including the Settings pages, produce only "Cannot make a cache safe URL for..." error messages. I can fix the error, I just can't get to anywhere that will let me reset the file.
I have no access to the server, no permissions to the parent site, and can't overwrite v4.master via WebDAV because it is "ghosted"(?) (see http://social.msdn.microsoft.com/Forums/hi-IN/sharepointgeneralprevious/thread/c5952364-c375-48c4-82bd-394d3b7e3c46) SharePoint designer is disallowed on the server (and I only have SPD2007 anyway)
Anybody got any bright ideas or tricks on how to reset or overwrite the v4.master file to fix my mistake? (besides getting a sysadmin to do it, which will take forever around here)
Edit: AAAH I am so close. I can get the list of master pages to come up again by uploading my repaired .master, then changing (via WebDAV)
/sites/sitename/_catalogs/masterpage/Forms/AllItems.aspx and EditForm.aspx to point to that repaired master page (by changing MasterPageUrl in the files), but when I try to upload a new file or access the version history to rollback, I keep getting bounced to /sites/sitename/_layouts/Upload.aspx or Versions.aspx, which I don't think I have access to change. I see a /sites/sitename/_catalogs/masterpage/Forms/Upload.aspx, but apparently that is not used from the master pages interface, which is mind-meltingly frustrating.