Many view files are marked as having an error in them (i.e. squiggly red underline in the project-files window and red markers in the file itself) because HTML 5 tags aren't recognized. For example, the error in one of my view files says "Element nav must be declared".
This issue was raised several releases ago and still has not been fixed. The thing is, it used to work so I don't see why the delay in getting this fixed.
It's nice to be able to see at a glance if any of your files have an error in them, but when you have lots of red squiggly lines appearing in your project window... well, not only does it render this "feature" absolutely worthless, it just looks bad.
Are you planning on fixing this?
P.S. Sorry to complain like this, but this problem has existed - and been pointed out - for months now.