I think there is an issue with some themes automatically adding
<br /> tags around HTML comments inserted by the plugin. Most of the support questions seem on the forum seem to be related to that. Since these tags are added after the plugin does its work, I cannot fix it in the plugin. What I can do is to give an option to suppress comments. I will make a release with it in a couple of days.
I am going to post the same reply to all the support questions here that I think are related to the spurious tags. In your case, could you post a link to your blog page so that I can take a look? Thanks.