Thread:Project:Support desk/SVG thumbnails displays corrupted./reply (5)

I guess you could also check for this error by uploading e.g. the lion ;-) file to wikipedia and see what happens there. When the problem is not visible there, then I would guess it is most likely not caused by MediaWIki but by your version of ImageMagick.

Maybe it is a strange error in ImageMagick; I know of cases where ImageMagick had problems with SVG files. Maybe that is fixed in a newer version? Seems like 6.8.7-10 is current...