Yes indeed they have!
Right now I'm struggling with Avast that seems to deny me to execute any compiled exe files that I make.
I get the "Unable to execute filename.EXE Invalid or unsupported executable format" error from, what it seems, Pelles C.
Disabling the filesystem protection makes it work again but that isn't safe so... Any one know how to configure the bl*** Avast thing from ruin my day? (Yes, I'm, a bit upset at the moment.
)
edit: Not being alone out there:
http://nerdanswer.com/answer.php?q=307043