Garbage in console scrolling up
When you've been in game for a long time, the console gets full of lines of information due to chatting/frag messages/etc. However if you set con_scrlock 2 and start scrolling all the way up, then try to jump back down, the console starts displaying garbage.
Its hard to explain, but here is a screenshot to show what happens.
Created attachment 266 [details]
Garbage in Console