Hi guys,

I have a really frustrating bug that I can't find a fix for, I am hoping you'll be able to help me.

Using Firefox (apparently any version), when editing a content block, I am unable to insert a link.

I'll talk you through it.

Within the Edit Content panel the user highlights the text which they want to add a link to. See attached screen-1.jpg

They then click on the insert/edit link button, however when the Insert/edit link panel opens you'll notice that the selected text becomes unselected as the focus shifts from the Edit Content panel to the new pop up. See attached screen-2.jpg

When the user clicks on the Insert button the Insert/edit link panel re-loads and all input information is lost. When I look at Fire Fox's Error Console I see: Error: elm is null - See attached screen-3.jpg and screen-4.jpg

I have tried the following to resolve the problem:
Manually updated tinymce to the latest stable release.
Removed any javascript includes that are not part of the standard installation.
Compared the base concrete5 folder/files to a fresh C5 installation but could not see anything that would have an affect on tinymce

Any help or ideas on how I can debug this would be greatly appreciated.

Thanks,
Jon