As reported in BUG: 186283 , the Filter page in the configuration of the Folder View applet behaved differently from user expectation. Some of the files were shown/not being shown when the opposite was expected. This was due to a peculiarity in the design methodology employed.

This SVN Revision does two things –

1.  Make the user aware of the conditions required whenever the showing and hiding of icons was concerned
2. Make it less likely for the user to make those mistakes by employing UI techniques.

Here is the screenshot of the new Filter page –