I think it's common, but not really a lack of trust thing -- instead the code is a work product unless what you are paying for is a functioning application + ho

I think it's common, but not really a lack of trust thing -- instead the code is a work product unless what you are paying for is a functioning application + hosting + support. If stuff is breaking then it means you have a more serious problem on your hands then just lack of access to the code base and that access will not solve it for you.