Blender Publisher 2.25 (NaN binary from this site, IRIX 6.5) seems to be incompatible with Windowmaker. It doesn't supply a window specification, and the blender windows don't resize to fullscreen, don't lose their titlebars, and you can't save window settings (like "don't bind keyboard shortcuts", which is important).
In other words, 2.25 is unusable under Windowmaker!
(everything still worked in 2.23!)
I beleve that in 2.25 they might have switched to a modified or rewritten windowing library. It could be because of bugs that had not yet been worked out on the IRIX version.