First off I just submitted a patch made by me and Patrick Baggett to add MIPS atomic operations support to the CS 1.2 threading system, mainly for building on SGI machines (IRIX operating system). http://trac.crystalspace3d.org/trac/CS/ticket/475
The main problem I'm having is that it seems that the wxgl plugin in 1.2 is defective on Mac OSX; the general sample apps (like simple1, etc) run fine, but wxtest seems to have a canvas rendering problem (and since my simulator app uses wxgl, it doesn't work either). I have CS built in debug mode on the machine if any in-depth info is needed. I don't know if this issue has been looked at already.
Basically what happens is that the app runs, the wx window displays, but initially nothing appears inside the window; if the window is moved, a black render area appears, but with seemingly no active rendering. Here's one screenshot of the problem (thought I took more, but I'll get more later - this shot is of my simulator running; the result is the same as with wxtest):
In that image, the entire window titled "Skyscraper 1.1 Alpha" is a render window, but shows nothing; if you move it, the window contents turn black.
The other issue is more complex and has been an issue for a long time. Me and some other people are trying to get CS to run on both Sun Solaris and primarily SGI IRIX, and are running into problems seemingly related to detection of GLX visuals and renderer parameters. On both platforms, the CS demos run, but they report that the systems are running in 15-bit color mode (even though Solaris is running in 24-bit mode, and IRIX in 32-bit mode), and end up with a rapidly flickering render window with no visible 3D rendering. I also have CS built in debug mode on both those platforms if any other info is needed; I'm working with some other people on trying to figure it out on IRIX, but wanted to ask you guys since I don't know a whole lot about the CS internals.
CS's simple1 verbose output on IRIX:http://ryan.tliquest.net/cs_patches/cs_1.2_irix_output.txt
and a memory breakdown of the simple1 app on IRIX:http://ryan.tliquest.net/cs_patches/cs_irix3.jpg