I have bent them inward slightly then eased them onto the port tops. The end result is a small tab placing a minute amount of pressure on the top of the ports. I just assumed that was what they were for. They don't look like production tabs (like plastic models), so I doubt they are left ver from the moulding process.
I just noticed the smaller tabs and remembered that I left them on, and I do not have any issues with plugging peripherals in. Again, slight pressure against the face of the port.
[SIZE=\"1\"]E6400 @ 3.4 , Noctua 120
7900GT @ 670/1680 , VF900
2 x 1GB Patriot 6400 @ 425
WD SATA 250GB
Neo HE 550
P180 / G15 / MX1000[/SIZE]