Ok, first:
Do not use the file:/// protocol over network shares!
Second:
Do not use the file:/// protocol over network shares!
Also, you should not have spaces in the url leading to the repository or the repository itself. You can have as many spaces and special chars inside a repository url, but not leading up to it. You'll only get into trouble.
And last:
I've fixed this special case in r28404.
And just in case you think that the warning about corrupted repositories that are accessed via file:/// on a network share doesn't apply to you: I had a user lose 5 years of data just four months ago - the backup was corrupted too because they didn't notice the problem soon enough.
So please: make a backup of your repository NOW. Then use the command line client to dump the repository, then create a new one and try to import that dump. If you get any errors while dumping or importing the dump then you're screwed. If not, then you have a little time to set up a real server. So do that now, don't wait until tomorrow.
Stefan