[Plugin: Next-Gen Gallery] Edited thumbnails displaying incorrectly on image li

Love the plugin, very handy.
Only one bug I’ve come across: when you edit the thumbnails for a gallery, the spacing on the “Image List” comes out irregularly. After a line of say 7 images, it will go to the next line, list one thumbnail, go to the next line, list 7, then 1, etc. so it looks like:
7
1
7
1

This only happens with thumbnails that have been edited through the NG interface. If I reset the thumbnails to the automatic cropping, the issue goes away and the images display fine.

If I have less than one line of images, this obviously isn’t a problem. However, if it’s multiple lines of images, the display breaks when you edit the thumbnail of the last image on the first line.

Here is a link to the gallery where this is in effect:
http://illobook.lunabeat.com/tato/sophie-broken-gallery/

I’ve also fooled around with the column count, but it breaks the display whether I have a column number set or not.

The only workaround I’ve figured out is to skip editing the first thumbnail of a gallery, edit the rest, and then edit the first thumbnail last. If I do it in that order, the gallery displays correctly:
http://illobook.lunabeat.com/tato/sophie-art/
If I start editing from the last image going to the first, the same error happens as then I go from first to last.

I read another post that seems to have a similar issue:
http://wordpress.org/support/topic/plugin-nextgen-gallery-thumbnails-display-on-different-lines-4-on-one-1-on-another?replies=4
but it was unresolved. Another user mentioned “The phenomenon of your thumbnails not lining is due to the width of the thumbnails not being uniform. This is an issue when you edit the thumbnail. I had brought this up with the author and he fixed it once but then the rounding has reverted back to only 2 places I think so it creates a thmbnail with an width less than 75 pixels.”
I found what I believe he’s talking about on line 42 of edit-thumbnail.php and fiddled with it a bit, but wasn’t able to get anything to work.

I would really appreciate any help! I don’t mind the workaround, but I’m about to install this for others and would like to have this resolved before then if possible.

Thanks!!!!