twentytwelve nav

I don’t see what you’re talking about.

Screen shot

Which browser are you using? I tested in Firefox and Safari and it worked fine here in both.

I see what you see in Chrome. That’s weird. Removing the space before the ? fixes it in Chrome. That could be a temp workaround. I’d say that’s some sort of bug in Chrome.

Changing this:
.main-navigation li a, .main-navigation li

from display: inline-block to display: inline fixes it, but I didn’t test it to see if there are unintended consequences.

looks like the same info is posted on the fix:

Changing this:

.main-navigation li a,
.main-navigation li {
display: inline-block;
text-decoration: none;
}
to this

.main-navigation li a,
.main-navigation li {
display: inline-block;
text-decoration: none;
}
fixes it (credit mindctrl)