When editing a page, text is being changed to a hyperlink

With Collaborative Editing enabled, some pages turn text into hyperlink text when editing.

Steps to Reproduce

1. Download the attached Storage Format
2. Create a new page in Confluence 6.0 with Collaborative Editing enabled
3. Download Source Editor plugin from the marketplace
4. Copy the text from the Storage Format
5. Use the source editor plugin to paste the text to the new page
6. Update
7. Edit
8. Update again

Expected Result

Text will appear normally with no links

Actual Result

The entire section will appear as a hyperlink

Other Information

Please note, if you disable Collaborative Editing, the page appears as expected.