Exposed filter with select list in Firefox not aligned with other filters

I have a view with 2 exposed filters - one is a text field with a select list, the other a date field with just the year as a select list. The date field's select list is displayed about 7 pixels lower in Firefox 3.5.6 (both Mac and Windows), whereas in Safari 4.0.4 and IE 8, they are on the same level. The labels are at the same level regardless of browser, though. I even created a new content type and view with the bare minimum, and it still does it. Minor issue, but it's pretty distracting aesthetically.