Windows. Any version. GTFO.
The key thing for me; at any point is it hinted at that you'll bleed into other roles?
Example: one of my previous job titles was Analyst Programmer... which essentially meant "Sometimes programming, sometimes re-writing requirements document so you can actually start coding, occasionally doing the Analyst's job and other times, well, good luck. May the force be with you.".
If you're applying to be a developer make sure that's what your role will be once you're through the door. Get a feel for a developer's role on a typical project. Ask them to explain the role to you - make no assumptions.
One other question I always ask is: "Suppose technology X becomes the new hotness, how do you fill the technology gap?". If the answer is "we just hire new people" then i'd get out.
Oh, and Windows.