DYLD_LIBRARY_PATH tells the dynamic linker (dyld) to look in the specified places for libraries before it tries the locations in the binary headers and subsequently crashes because it can't find anything. It makes sense then that otool doesn't tell you where the libraries that are actually being used are coming from, as this is being done at runtime and requires no static changes to the binaries. You could set the correct places in the binaries, but you're going to have to edit the build configuration for qt and anything that uses those dependencies. Imo that's not going to change anything and you'll just spend time pulling your hair out.

I don't know what the problem is for everyone since there's only one post with actual error output and it's a segfault. I can't debug that without being able to reproduce it.

If it is trying to find more libraries installed globally that aren't there, you should get an error saying so. If this is the case it's not a big deal, and it can be fixed. I really don't think it is, though, as this would have come up again at some point in the past month.

I suspect some of the problems are coming from the fact that the minimum OS X version is set to 10.8 in the python executable, since etotheipi is building on 10.8.

You can do a search/replace with a hex editor on any binaries you think have a minimum version set like so:
Search: 24 00 00 00 10 00 00 00 00 08 0A 00 00 08 0A 00
Replace: 24 00 00 00 10 00 00 00 00 06 0A 00 00 06 0A 00

This will change the minimum version from 10.8 to 10.6