I'm using an image as the submit button for a search form, i.e.:
<input id="search" type="image" alt="Search" src="/images/searchButton.png" name=""/>
This has an unfortunate side effect in Chrome and Firefox--the parameters &x=0&y=0 appear on the end of the search results URL, for example if I search for "food" I am directed to the page:
Some hunting around online has indicated that this is standard behavior when you use an image to submit a form.