About [[EtherpadLite:Pad.modals.badChangeset.explanation/en]]

CLOSED This issue is closed by siebrand

Computers still cannot interpret law, so the adjective "illegal" is probably the wrong one to use here. Presumably something like "invalid" or "incorrect" or "corrupted" was meant.

http://www.thefreedictionary.com/illegal: 3. Unacceptable to or not performable by a computer: an illegal operation.