It appears to me that this is still present in Oneiric. If I make a note of the last message in the window, press PageDown, that noted message is not visible at the top of the screen, and if I use the Up directional key, there are one or two messages that were "skipped" before I can see the message I made note of. This is particularly a nuisance since I dislike scrolling the Gwibber window due to lack of smooth scrolling, and PageUp PageDown would be a nice alternative if it showed all messages.
It appears to me that this is still present in Oneiric. If I make a note of the last message in the window, press PageDown, that noted message is not visible at the top of the screen, and if I use the Up directional key, there are one or two messages that were "skipped" before I can see the message I made note of. This is particularly a nuisance since I dislike scrolling the Gwibber window due to lack of smooth scrolling, and PageUp PageDown would be a nice alternative if it showed all messages.