Please describe the problem:
In long pidgin conversations, window text isn't updated when scrolling and using flat review.

Steps to reproduce:
1. 
2. 
3. 
1. Open a pidgin conversation and generate more than one screenful of text.
2. Review a line or two using flat review.
3. Scroll the window up such that more text is revealed.
4. Try to move to the new text.

Actual results:
Flat review ends where the original text stops and doesn't reveal the new text.

Expected results:
I'd expect to see the new text.

Does this happen every time?
Yes

Other information: