I got the twitter bootstrap dropdown buttons successfully working, but I have a tiny problem. The black navbar here:
http://twitter.github.com/bootstrap/javascript.html#
Here's a refinement to Jason Towne's answer.
This works correctly if the menu has been pulled to the right.
.dropdown-menu-arrow::before {
border-bottom: 7px solid rgba(0, 0, 0, 0.2);
border-left: 7px solid transparent;
border-right: 7px solid transparent;
content: "";
display: inline-block;
left: 9px;
position: absolute;
top: -7px;
}
.dropdown-menu-arrow::after {
border-bottom: 6px solid #FFFFFF;
border-left: 6px solid transparent;
border-right: 6px solid transparent;
content: "";
display: inline-block;
left: 10px;
position: absolute;
top: -6px;
}
.btn-group.pull-right > .dropdown-menu-arrow::before {
left: inherit;
right: 9px;
}
.btn-group.pull-right > .dropdown-menu-arrow::after {
left: inherit;
right: 10px;
}
Here's an example of usage.