Need help, can't get it to work

Issue Summary

This module looks very promissing to solve some of my customers requirements and I'm keen to contribute to this if I could get it to work.

Examples:

I tried it with contextual links on a clean D7 install and I even disabled the module overlay, but what happens is that when clicking a contextual link the dialog opens with the "Loading..." message but what comes back from the server is a pure html output which causes an error in form of another dialog opening above the original dialog showing that html code. When closing that second dialog I'm back to the original dialog which I then have to close manually.

Then I tried with comments and loading the page with a comment form included I get a javascript error message saying that .once() isn't a function. This error comes from textarea.js and is gone as soon as I disable the dialog api module again. Strange.

Last but not least I tried the dialog user module and that doesn't seem to be doing anything. When I click on a link to get to /user/register I just get the normal page instead of a dialog.

Still, this looks really promissing and I'm sure I'm doing something wrong. Hope somebody can help me to get over that first hurdle.