No but I did get this for facebook at first when i started to use Dolphin HD. So i would not think too much about it. All it is, is that it may see you as surfing the site from a completely different area randomly. It flags it and lets you know.
Yea I use to get it all the time....frigging annoying.
Its from hitting the return key too many times if you're backing out of web pages in the browser to close it. Now I just use..Menu...Windows...and close out whatever pages or tabs are there and then close the browser.