There's an odd bug with our installation of Moodle 1.9.x which comes up occasionally.

"overLIB 4.10 or later is required for the CSS style plugin"

This seems to be caused when one of the javascript files fails to load properly, and then gets stuck in the users browser cache.  

Clearing the users browser cache normally fixes the problem. In one case last year, it was simpler to to force to to refresh from the server side, and so I temporarily added a dummy version parameter to the end of the line in lib/javascript.php which loads overlib.js to become eg. overlib.js?update=1. A cleaner way to do this, depending on how your etags are configured, might be to update the last modified date on the file in question - so "touch lib/overlib/overlib.js" might also help.

Learned a few tricks today while trying to debug problems with a Promethian ActiveBoard 2+.  The board was not responding to any pens.  After a short time discovered that the "pen" was a Wacom digitiser stylus, so tracked down a real Promethian pen.  

The board was being recognised in the ActivManager hardware section, but the pen movement and touch was having no effect.

Restarted the PC.

Updated to the latest version of ActivInspire, and also separately updated to latest ActivDriver.

Turned off the projector, waited for cool down red light to stop flashing.  Power cycled the board by unplugging, waiting 20 seconds and plugging back in again. 

Disconnected the USB cable, waited for one minute and plugging back in again.

Two useful tricks learned:  

1. To escape from the calibration when pen is not working, right click on your mouse.

2. Our ActivBoard 2+ works after a fashion while in standby mode (button is red).  The pen works, but the tracking is erratic and lines are a bit jaggy when the power button is on red/standby.  Make sure that the board is turned on with green light showing.

Knowledgebase:

http://uk.prometheankb.com/display/4/kb/article.aspx?aid=313911&n=1&docid=16844&tab=search