Filtering by yes/no attributes

[wschumi]

I have recently moved my database from IMatch 3.6 to version 5. I have used yes/no properties in 3.6 for my pictures. Now, I want to use filters on these attributes in IMatch 5, but it does not seem to work. When I run a filter with an attribute = yes, it will filter out some pictures, but not the correct ones. The strange thing is also that when I deselect the yes check box, the result is exactly the same. Is this a bug or am I doing something wrong?

In the filter manager, I have checked Attributes and selected one of my attributes (Images.Slideshow) and selected "Is" on the drop down.