by MARK WEST 09/14/10
Jumping and Spiking are two quirks associated with ActivPens; they are both somewhat rare, but do happen.
If the pen cursor moves itself around randomly, this called Jumping.
Spiking is when the cursor jumps between points, creating jagged, non-smooth text.
The basic solution is to reset (i.e. power off) the board. When doing so keep these things in mind:
If this makes you nervous because of the Mercury issue, every school has a tech coach, ask her/him to do it for you.
Usually resetting the board fixes the issue. If the problem persists, there are more steps here: http://us.prometheankb.com/display/4/kb/article.aspx?aid=216353&n=1&docid=4985&tab=search