Not Mavericks-specific, but Finder is notorious for hanging when mounted volumes become unavailable or unreliable. And it's certainly possible that some of the

Not Mavericks-specific, but Finder is notorious for hanging when mounted volumes become unavailable or unreliable. And it's certainly possible that some of the network filesystem changes in Mavericks — in particular, it now uses SMB in certain cases where previous versions would have defaulted to AFP — could lead to this behavior in situations where you didn't see it before.