Hey!
I actually downloaded an older version (0.5.4) that still had the dotted lines (I haven’t binary-searched to find when the lines disappeared though). Is your plugin a fork of another plugin with a similar name? Version 0.5.4 looks close to what I remember, but it was a while ago.
Here’s a screenshot of what I see: http://i.imgur.com/60vDt4A.png
Note the little arrow tip which is detached from the window; at first that looked to me like some sort of conflict with the CSS, but the screenshot was taken after installing the latest version of the plugin with the latest version of WordPress (fresh install).
PS: sorry about the tone of the last paragraph in my previous post: I’m a lunatic 🙂
