Firefox 3.5 crashes

The same happened to me using Google Chrome when I've clicked on the image button. I'm using IMCE and configured the profile accordingly.

Seems like a critical issue. I can confirm this on Chrome, however I did not manage to reproduce it in FF.

@krima (and anyone experiencing this issue) - could you list all installed extensions in FF, Drupal modules and your antivirus software (we need the exact version numbers).
Does it happen if you're running FF in safe mode with antivirus program disabled?

Hi, not sure if related but the problem I get when clicking on any button with popup I get slow or unresponsive messages in Firefox and Safari while Chrome crashes. This happens when using the drupal.ckeditor.com website... It does not happen when I have ckeditor running locally on a vanilla Drupal 6.14 installation.

Once this problem happens once the popups then load with no problem.

This bug was reported to CKEditor on http://dev.fckeditor.net/ticket/4733. There is patch, which can be used to fix a bug.

@anyone experiencing this bug: could you please check an updated version of CKEditor 3.1 with patch #4733: CKEditor 3.1 prerelease + patch [.zip] (1.1MB) or CKEditor 3.1 prerelease + patch [.tar.gz] (1.6MB)?

Please let me know whether you're still experiencing this issue when using this version of CKEditor. Make sure you have cleared Drupal cache and browser's cache before testing it.
Please remove the old version of CKEditor (the editor, not the whole module) before uploading new files.

installed the linked CKEditor and it seems to have resolved the issue on Safari, Firefox and Chrome (haven't tested Explorer yet). Thanks :-)

Thanks for testing the patch, an updated version of CKEditor 3.1 prerelease is now only available for download, so marking as fixed.