You could certainly add classes with javascript. The addClass method is really simple. What exactly are you trying to accomplish by adding the classes?
Data Value Changes triggers only pick up field changes on existing records. What you're looking for is the Lead is Created trigger, along with the green filter for your field and d...
This can sometimes happen when you have sharing/visibility rules enabled in SFDC and the lead which Marketo created is invisible to the sync user because of the rules. I would chec...
Additional APIs are announced with each quarterly release notification if there are any included, with additional detail on the developer's blog: http://developers.marketo.com/blog...
There's no built-in functionality to grab content from a custom object which does not have an association to lead records. This would require custom development, and probably using...
I don't see anything out of the ordinary here. You might want to file a support ticket with this info(and a timestamp of the unsuccessful call) to see what they can find in the log...