+1 I have the same issue with csharp highlighting. The only fix I have found for the moment is to have some form of tags at the start and end of the code eg:
[csharp]
<some tag>
// all my code here
`</some tag>
[/csharp]
The issue is that obviously these tags show up in the highlighted code which looks stupid. This only happened after the update. Is there a way to avoid having to use arbitrary tags?