There was a 1 pixel border in a couple of the themes in the theme pack which has been removed. The 1 pixel border was on the search form. There was also an update to the textarea in the simplicity theme.
You can downloaded the updated theme pack here:
Download the Theme Pack Update
Once you unzip the files you can just copy the theme folders over and overwrite your existing ones.
Thanks to everyone that has downloaded the Theme Pack and otherwise emailed me, blogged or left comments. I hope you enjoy them. For the record we hit 1000 downloads of the theme pack today.