Awkward blinking text cursor in Firefox?

[lu0s3r322]

This isn't really problem but every time I'm typing something in the Firefox 3 address bar or the search bar the blinking cursor is not just a straight line, there's a little branch sticking out of it. I took a screenshot:

 

[hobbbz]

Same issue here. I just assumed everyone knew about it and it was either being worked on or not a big enough issue.