Bjarni opened the ticket and wrote:

for PPC we need to support all the way back to OSX 10.2 if possible, so dynamic linking is out of the question (they don't like opening libs in non-standard locations)
OpenTTD can't link statically to anything newer than SDL 1.2.7
I can't crosscompile SDL 1.2.7 for x86 OSX, but 1.2.9 can compile, so x86 needs to be dynamically linked to SDL. Luckily x86 is at least OSX 10.4 (developer edition, that is not for public release) or 10.5 (public release), so adding a dynamic lib to the release is possible

The result of this is that the universal binaries have to be static linked PPC code and static linked x86 code except for SDL, which will then be dynamically linked. This is NOT nice, so we better get rid of SDL. Specially since it causes so many issues, not just this one

Reported version: trunk
Operating system: Mac OS X

This issue was imported from FlySpray: https://bugs.openttd.org/task/18