Sorry for all the reports... I just started looking at this forum and realize a lot of bugs I figured would be in here, aren't.
This one's just a bit of annoyance more than anything. When using /sil to put images into frames or on signs, most normal angles and distances that should work, do not. It requires a lot of moving around to find the correct place to use the command where it can place the image, and on certain walls it's nearly impossible to use the command at all.