Created attachment 613296 [details]
scanimage output, resolution 150

Hardware:  lenovo desktop12.  Running vanilla openSUSE 13.2 via NFS root.

Doing a scan like these:

scanimage  --mode color --resolution 300 >office12-scan1.pnm
scanimage  --mode color --resolution 300 >office12-scan2.pnm

produces some pretty weird colours, see attached. 

Omitting the resolution argument or specifying "--resolution 50" both lead to a
"Error in `scanimage': double free or corruption (top): ". 

I have sane-backends-1.0.24-2.1.10.x86_64 installed.