Why does fontforge say “Error loading dynamic library” when trying to import an image file?
FontForge depends on certain dynamic libraries to load images. It does not check for the existance of these libraries until you actually try to load an image. If the library has not been installed on your system it will give the above error (and fail to load the image). The Dependencies section of the main page describes how to find these libraries. If the libraries are installed and you still get this message try setting your LD_LIBRARY_PATH variable to the directory containing the library in question (On the mac this is DYLD_LIBRARY_PATH).