Came across an interesting bug on one of my client's sites the other day. She was having problems with a link being pushed off her screen. So following the basic diagnosing a problem rules, I found out she was using Firefox. Checked that it was fine no problems. So naturally asked her to provide a screen shot. Snap shot below.

As you can see this was most strange as her browser had added in all this additional formatting around the phone number, causing the email link to be pushed out. Naturally this intrigued me to find out what was causing it, so after looking on several forums found out that it was a Skype Plug-in on Firefox. So basically when you browse a website and see a phone number on the site, the Skype extension automatically converts it into a button that you click to call the person using Skype. Although quite handy for some, very annoying for others, and looks like Skype secretly install it without you knowing.