I'm on linux, use the normal build using Configure. I build with threads, and put it in /usr. I did the exact same thing with the upgrade from 5.8.6 to 5.8.7, and it went smooth. This time it asked what earlier versions I wanted to include in the search path, I chose the default 5.8.7, and my Tk and Gtk2 scripts segfaulted.

I have the latest Glibc libs, and gcc-4.02.

No big problem, I reinstalled them all from scratch in a manner of minutes, but I was just wondering/reporting about binary compatibility, and if anyone else sees it.