I ran some tests and the filter you have created does work and excludes the subdirectories (but not the files) of the media/showtime/....../source directory.
I believe that you are trying to exclude the entire "source" directories, i.e. both their files and their contents. You should change the type of the filter to "Exclude directory" instead. The "source" directories will not appear in the backup, at all.
If, however, you want to include the "source" directory but not its files or filters -in other words, an empty directory- you need to create two identical filters, one Exclude Subdirectories and one Exclude Contents.
Davide Tampellini
Developer and Support Staff
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