Attempting to "Show Differences" on a file located in a folder with a name starting with "$" will throw an error.
For example, when trying to do a compare on a file "test.build" located in /$BuildScripts (working directory "E:\Dev\$BuildScripts"), the following error is thrown:
Other actions in Vault don't have any problems with folders starting with a "$", but the DiffMerge utility apparently does.Cannot stat file.
Error: Failed to open "E:\Dev$BuildScripts\test.build" for reading..."