>I have a found a bug that I can easily reproduce with the "Tools\Options\Text Editor\Basic\VB Specific\Enable highlighting of references and keywords".
>
>Basically, if I open a project and I would adjust that setting, without doing anything before, such as opening additional .vb files in the environment, it would work. As soon as I start adding additional .vb files in the environment and try to adjust that setting after, it crashes. Basically, it closes by itself and I can restart it after. Only the application crashes. So, all the rest of the Windows is ok.

I can reproduce. Looks like a bug. AFAICS it allows you to turn on (check) the option but crashes when it is being unchecked....
Debug shows 'Access violation reading location x0'
Doesn't occur unless documents are open in VS, always occurs if there are.....