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We test the application in Internet Explorer 8, Firefox, and Chrome. The best experience will be in Chrome, then Firefox, then Internet Explorer 8.
Is there a geocoding service?
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A very small fraction of addresses in EAS will have the wrong zip code. These addresses will generally be near the boundary of the zip code area. Zip codes are not critical for us to deliver services so this is not really an operational issue. When we update our zip codes, we use a data product that is derived (and generalized) from the USPS zip code data. It is the generalization that causes these errors.
EAS opens extra windows, sometimes lots of them. Why won't it use tabs?
If you have this problem you are probably using IE8. If it bothers you, you can "disable protected mode" by doing the following.
Tools > Internet Options > Security > Security For This Zone > Enable Protected Mode (uncheck)