I've been looking this days to the code (using google chrome and its Inspect element feature) of several pages in order to see what they are doing (javascript, css, html, etc...) and I've seen something strange when searching for gmail at www.google.es (It's the same with www.google.com)
Just go to the link or search it yourselves and you'll see:
What is that line doing there? I already tried cleaning my monitor but it's not that ;)
I tried to look at the code in order to see if I could understand what is going on but I can't see anything strange:
Any ideas?