I've just installed the latest 4.2.1 VBox on my iMac OS 10.6.8. I am going to run guest Linux. Besides, I need some communication between host and guest. According documentation, the "Guest Additions" solves the problem.
So, I wanted to install it into my guest using OTN. However, the download page has warning: for 4.2.0 only. Will it work with the latter(?) 4.2.1?
There aren't any forums at this OTN site for specific help with Virtualbox.
The forum you happened to post your question to happens to be for a thin client infrastructure kit and has nothing to do with your inquiry..
You will need to go elsewhere.
Consider their Community resources (which do include forums):