I\'d like to know what the currently checked out revision number is for a file or directory. Is there a way to do this in TortoiseSVN on Windows ?
Before "Change your Explorer windows to Details View. Navigate to an SVN-controlled folder then go to View > Choose Details and select the SVN columns for status/rev/etc."
you have to change your Windows Registry settings, adding this DWORD value
HKCU\Software\TortoiseSVN\ColumnsEveryWhere
and setting it to 1, as stated in the TortoiseSVN documentation.