When you click on the arrow next to the search field, a box with filters is displayed. There are a bunch of issues with this:

The overall appearance seems off. There's a lack of internal padding. The corners of the box don't seem to be drawn. It is also placed so that it overlaps with the edge of the search toolbar.

The rest of the window remains sensitive while the options box is displayed, so that you can click on the toolbar buttons or on the items in the grid. This can create some odd situations, such as showing a document or selection mode with the search options box still displayed.