Last modified: 2009-10-28 18:21:20 UTC
The page http://translatewiki.net/w/i.php?title=Support&diff=677318&oldid=677286&htmldiff=1 at its lower end includes "26th of August..." in the green field. Wikitext diff http://translatewiki.net/w/i.php?title=Support&diff=677318&oldid=677286&htmldiff=0 does not. Since the older edit was mine ;-) I know that, the wikitext diff is correct, whilst the html diff marking is not.
Was related to HTMLDiff, removed by bug 19859 and r58267.