I've just encountered something weird in the WebUI. On our contacts we have created some checkboxes via the AET. By default they were added to the search parameters on the contact search.
Now, when I try to search contacts who do NOT have the flag checked, I just get them all (checked and unchecked). I debugged the search method and found out that actually the system is interpreting the "unchecked" search parameter as a blank value. Searching for a blank value means...selecting them all.
Did anyone encounter something similar and found a way to solve this?