"Scroll to bottom" (chat) example: Adding text too quickly breaks pane with animated scroll

What steps will reproduce the problem?
1. Add text to the panes by clicking the link on the page.
2. Add more text before the scroll animation for #pane1 is done.

What is the expected output? What do you see instead?

#pane1 will completely stop auto-scrolling until the page is refreshed. Even if 
you wait until the second animation is done and then click a third time, it 
won't scroll to the bottom. #pane2 will continue scrolling correctly.

What version of the jScrollPane are you using? On what browser? And operating 
system?

Not sure what version of jScrollPane is used; couldn't find it in the source 
code. This bug appears on Win7: Chrome 21.0.1180.83m, Firefox 14.0.1 and IE9.

Please provide a URL to a page displaying the problem.

http://www.kelvinluck.com/assets/jquery/jScrollPane/chat.html

Please provide any additional information below.

Original issue reported on code.google.com by m...@megmitchell.ca on 29 Aug 2012 at 5:50

jeffreyhi1 / jscrollpane

"Scroll to bottom" (chat) example: Adding text too quickly breaks pane with animated scroll #271