In most of my flash projects I have a prototype file I include into the project. It contains additions to core objects such as Object, MovieClip, etc. Well, today I found out that some Macromedia components (ComboBox was the one I was having trouble with) don’t like additional methods to be defined on certain classes (Object was the one I found that ComboBox was having issues with); they fail to continue to work with additional methods defined. However, there is a workaround: ASSetPropFlags. Simply hide all additional methods with this line of code: [code lang=”actionscript”]ASSetPropFlags(Object.prototype, null, 1);[/code] I can’t wait until AS3 can be used all the time.