Internet Explorer &$%^ing $&*@#.
We're dealing with form elements here which are the most difficult things to style with CSS because they are specified differently from everything else, many of the things that should work - don't, and much of that which does - works differently in each browser. Firefox is getting this right and although there are several ways of getting something that approximates what you want, I haven't come up with one that is exact, doesn't also affect FF and doesn't change your look slightly.
The easiest and least destructive is to add some line height to the wrapperAttribsOptions class. 16px or 1.6em does the trick. Anything less won't. If that's too much spacing for you, you could reduce your font size and your line height in proportion.
Grrrr Internet Explorer Grrrr
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(Questions answered in the forum only - so that any forum member can benefit - not by personal message)