The OPAC seems to have a major bug when doing an advanced search on subjects.  If I do an advanced search on two subjects with the AND operator, it works find, but if I do the same search with the OR operator, it runs the search with AND.  This is seen in the URL.

This does not seem to be the case with a keyword search.  OR works just fine.

I can manually change the ANDs to ORs in the URL, and it will do the search as expected.  The problem seems specific to using subjects (at least on both criteria).

The OR operator works just fine on the staff side.  It seems to be isolated to the OPAC only.