Packaging and cyclic class referencing problems

[msteggo]

Anyone know of a good source that shows a good solution to these errors:?

"The class <classname> could not be loaded...",
"The class <classname> conflicts with the previously loaded class <classname>..."

I'm having a heck of a time trying to implement some design patterns, like Observer and MVC, inside packages...these patterns include some cyclic class referencing.

Thanks ahead of time,
Mike
Frustrated Flash Developer