In my wiki, if I set the image
[[File:StackOverflowProvilePic.jpeg|left|Yes, this is me]]
then the image displays on the left with text flow around it all right, but the caption is missing -- although it does display as an Alt.
[[File:StackOverflowProvilePic.jpeg|thumb|Yes, this is me]]
causes the image to thumbnail, and then the caption appears. I can make the image appear on the left and the caption appear if I do this
[[File:StackOverflowProvilePic.jpeg|left|thumb|Yes, this is me]]
But I don't want to thumbnail the image! How do I make this work with a caption without thumbnailing it?