I had the same issue
Message: 'length' is null or not an object
Line: 1483
Char: 9
Code: 0
URI: http://parkland.sd63.bc.ca/lib/editor/htmlarea/htmlarea.php?id=10
This seems to be IE8 misbehaving with Java Script - not moodle. I have forum topics about this issue with other CMS systems like Drupal.
THE SOLUTION I FOUND:
I found it here - http://tracker.moodle.org/browse/MDL-19396
Is this:
Edit /lib/editor/htmlarea/htmlarea.php
line 1548 (Moodle 1.9) change the following string
if((HTMLArea.is_ie ? attrname.length > 0 : attrname != null)) {
to
if((HTMLArea.is_ie ? attrname : attrname != null)) {
Works. .length seems to throw an error on a null in ie8.
Remember moodle caching is really sticky, refresh the heck out of pages after you update.
Spread the love peps - share your solutions.
Thanks,
- Rachel