The hot spots for list style select options are wrong after a page is scrolled. 1. Go to http://webkit.org/new-bug 2. Change one of the options under the Version/Component 3. Making sure the window is small enough to cause the page to scroll, scroll the page but make sure the Version and Component selects are still visible. 4. Try to change the option selected in Version/Component, the clickable area is wrong. 5. Scroll the page back to the top and the clickable area is correct.
Filed as <rdar://problem/4808059>
This seems to have been fixed recently (tested with r17633).