When using %title for img title and %name %title for img alt, I see a leading space in the alt tag but not the title tag.
title="This is a post" alt=" This is a post"
Also, if there is " - " in the post title, it shows up with several spaces, like this:
post title: WordPress Survey 2012 – Help Shape WordPress
title="WordPress Survey 2012 Help Shape WordPress" alt=" WordPress Survey 2012 Help Shape WordPress"
Looks like %name isn't picking up anything but adds a leading space.
If I use just %name for alt tag, I get invalid HTML: http://screencast.com/t/z62YYytkpE
If I use just %title in alt tag, I get no leading space in the alt tag--works just like the title tag did above.