I believe there should be an option where the user can select if he prefers the new irc text to appear at the bottom of each window and scroll up when new text is typed, or if he prefers the new text to appear at the top part of each window, and as new text is appear the text to scroll down.
Personally, I believe it is more convenient the new text to appear at the top part of the screen and old text at the bottom. This is natural also with the style of web - most important information is placed on top side (here most important info is new typed text). I feel a bit confused seeing the text to scroll up from bottom, and not to scroll down from top.
An option should be available.
