Slackware :: Slow Terminal History Browse Using Vesafb ?

I've just installed Slackware 13.1 and am using a VESA framebuffer on a dv5-1251nr HP laptop with standard hardware.

In bash when I browse the command history using the up/down arrow keys the input line changes rather slowly.

For example, when I am on the history command

Code:

And the next command I go to is

Code:

The terminal input line deletes each character from the beginning and changes something like this:

Code:

But going the opposite direction, from

Code:

To

Code:

Is instant.

The effect does not happen with VESA turned off. I've used VESA on other computers without this problem.