Filters customization - multiple folders in "Search in" not working

I’m having trouble getting my custom filters to work in v6. In v5, I could put multiple folders, separated by semicolons, in the “Search in:” field. Version 6 doesn’t seem to be respecting them. For instance:

I can do an unfiltered search and find a file in one of the folders specified in my filter’s “Search in:” field. However, if I use the filter, the same document doesn’t show up.

I’ve checked the help file here, and don’t see any reference to syntax of semicolon with multiple folders in “Search In:” field:

Thanks for any help.