GTK List performance?

[NoBugs!]

Has anyone else noticed that the gtk lists are very slow in 10.04? When holding down the arrow key in a very large list, it can use a lot of cpu, and not stop scrolling until many seconds after you release the key. I noticed this in wireshark, and other programs, however, when running wireshark on a mac I didn't notice this problem. Could this be a configuration problem?

[Dolerho]

Same problem with Wireshark here.

[NoBugs!]

Do you think it is a bug in Wireshark's list-display, or GTK?