Select box and IE6 bug

I know that IE6 is almost gone from the scene, but I just read somewhere that close to 2% of people world-wide are still using it.
This is how our search looks in most browsers:
View attachment 125991
But then when it comes to IE6 the select box looks like this:
View attachment 125992
I added a line-height and it does have a regular height of 30px, still it stays this way in IE6.
Any ideas how to work around the bug?
Thanks.

See original post by qwikad.com