I cannot help but think that Openvix had something to do with it because of this note in their log:
openvix: build 029
Add more sh4 changes
Add more sh4 changes
Does it really matter who made the image and who supports or does not support it? Load it on a SH4 and try it. You will see that the Vix SH4 is a very good image. Time will tell if this image is supported in a major way.