The folks behind SAOImage DS9 have now released version 5.1. The big change I’ve noticed since the last version is that version 5.1 works without issues under Leopard’s new X11 implementation. Of course, the disadvantage is you now must download a version compatible with your OS version as well as your CPU.

More detailed release notes are available here. See my previous post on SAOImage DS9 5.0 to see how it is possible to upgrade the binaries included with SciSoft OSX.