Unpredictable behaviour using Styles

[david.public]

I'm experiencing odd behaviour with Styles based on the Span tag.

You can replicate this in the demo page at ​http://www.fckeditor.net/demo:

• Create some paragraphs. eg create 6 paragraphs with the text ('One', 'Two', 'Three', Four', 'Five', 'Six').
• Select the 5th paragraph and apply the Custom bold style.
• Select the 2nd and 3rd paragraphs and apply the Custom bold style.
• Switch to source view and switch back to design view
• A gap will have appeared before the paragraph 'Four'.
• Switch to source view and switch back to design view again.
• More gaps will have appeared, and paragraphs will now appear in the order ('One', 'Four', 'Five', 'Two', 'Three'). Only 'Five' is now bold.

I have experienced different variations, but this is the easiest to replicate. As far as I could tell the problem applied when more than one <span> tag appeared on a page. The first tag seems to get incorrectly closed.

As far as I can tell the bug does affect the saved HTML.