The fourier plug-in crashes on my alpha. I get following warnings while compiling: gcc -g `gtk-config --cflags` -O2 -Wall -c work.c work.c: In function `bla': work.c:1530: warning: control reaches end of non-void function gcc -g `gtk-config --cflags` -O2 -Wall -c backfourier.c backfourier.c: In function `doit': backfourier.c:263: warning: assignment from incompatible pointer type backfourier.c:202: warning: `outb' might be used uninitialized in this function backfourier.c:202: warning: `outc' might be used uninitialized in this function gcc -g `gtk-config --cflags` -O2 -Wall -c fourier.c fourier.c: In function `doit': fourier.c:202: warning: `outb' might be used uninitialized in this function fourier.c:202: warning: `outc' might be used uninitialized in this function gcc -g work.o fourier.o -o fourier `gimptool --libs` `gtk-config --libs` gcc -g work.o backfourier.o -o backfourier `gimptool --libs` `gtk-config --libs` It still gets me an executable, but when running the plug-in on an image (RGBA), I get the good old reproducable: /home/jsmaby/.gimp-1.1/plug-ins/backfourier: fatal error: Segmentation fault /home/jsmaby/.gimp-1.1/plug-ins/backfourier (pid:5959): [E]xit, [H]alt, show [S]tack trace or [P]roceed: Perhaps the code just isn't as portable as it needs to be to work on my system. Also note that on a starting image, backfourier is active, while fourier is inactive. Shouldn't this be the other way around? I don't have a debugger installed, otherwise I'd give you a few more details about where that seg fault came from. Thanks. -James Smaby