Text cursor appears out of the Source editor's textarea on resize events. This seems to be an IE9-related issue.
- Start the Portal, and navigate to it in IE9
- Create new Web Content
- Edit the above Web Content and start adding a translation
- Switch to Source mode, click in textarea, and either collapse the CKEditor toolbar, or resize the floating panel by grabbing its right edge (repeat this 2-3 times)
- Caret will pop out of the textarea and it starts blinking underneath
This issue is related to an IE specific workaround in CKEditor. Textarea is hidden for a moment to ensure that it fill its holder element entirely. However, invisible textarea hands focus over to the holder and never gets back.