If I have a component: "component, sub" and have 5 bugs in this component and then search for bugs in that component only, I get zarro boogs. The problem has to do with the way Search.pm builds the query from multiselect fields. Since these are joined with commas (',') Search tries to split the component on the comma or ignores it. At the very least components (as well as versions, milestones etc) should not allow commas in the name if this is the case.