Collapsiblock no longer works and I'm not sure exactly what caused it. It seemed to start after I installed Panels 5.x-1.2 module. Collapsiblock has worked well for me for quite some time. Then, after installing Panels, blocks would open but not close. Now I can't open or close the blocks and the 'arrow' indicating a collapsible block doesn't show either.

I don't know if it might also have something to do with panels or the jquery update module. I'm currently using jquery update module to add Lightbox2 functionality to a image gallery.

MissyM (http://drupal.org/node/270562) seemed to hit the nail on the head when she said it seemed like "something was out of sync."

I've removed the Panels 5.x-1.2 module and jquery_update and jstools. I then reinstalled jquery_update and jstools. The latest versions I've tried (with no success) are jquery_update 5.x-2.0 and jstools 5.x-1.x-dev.

Also, now when I go to ADMIN > SITE BUILDING > BLOCKS and try to edit a custom block that I created, I get a blank white screen. However, when I try to edit a block that came supplied with Drupal or another module, they seem to open fine.

Any suggestions on where I should go from here? Would you suggest deleting jquery update and reverting back to the original jquery? Could I have done something to screwup the jquery update installation?

Thanks.