I had to get this working for a client project and wanted to use the core module, so I patched up the 1.0.9 version to run under DNN 5.5+ and added a bunch of functionality. 

Get the patch from http://dnnmap.codeplex.com/SourceCont...
It should address almost all of the issues that people have been having. 

You can now also control the hover tag on pushpins and define a callback function that will be called each time a popup is activated so you can jQuery or otherwise affect the contents within. 

I can answer my own question. To patch this you can use a tool like TortoiseMerge. All you do is select the patch that Chris uploaded to codeplex and then select the directory the code is in. Voila. That's it. Thanks for the patch Chris.

New to DNN. Having trouble using TortoiseMerge to apply patch. I get error messages that the path does not exist. So I started editing the diff file to point to my Map folders. But I do not have the same filenames that are in the diff file. I don't seem to have any .vb files. What am I doing wrong?