Confirmed.
The part that drops down is set to either:
- The height needed to show all entries, or
- The height needed to show
x
entries (with scrollbars to see remaining), wherex
is- 20 in Firefox & Chrome
- 30 in IE 6, 7, 8
- 16 for Opera 10
- 14 for Opera 11
- 22 for Safari 4
- 18 for Safari 5
- 11 in IE 5.0, 5.5
- In IE/Edge, if there are no options, a stupidly high list of 11 blanks entries.
For (3) above you can see the results in this JSFiddle