When using Constituent > Constituent Search, the Zip Code field does not clear out any leading or trailing spaces.
Steps to Duplicate:
1. Enter a zip code (without a space) and perform a search to get results 2. Highlight the zipcode and hit space to delete it 3. Enter a new zip code and select search. Notice you do not get any results because of the space at the beginning.
We are currently evaluating this issue and will update this article when we have more information.