skirep - The current release is NVD 4.04. If you purchase that version, the registration code you will receive will work on the NVD 4.2 Beta as well. You will also get a free upgrade to the final release of NVD 4.2 when it becomes available.
Jordan - OK it looks like the blank screen issue has been fixed. This fix should address some of the other hangs as well. Also, this is very exiting, support for 1280x1024 has been added! We'll probably release a Beta 2 within the next few days. Please check back on the
Dell Axim X50v Beta Test Page for more info.
The last issue you mentioned is a difficult one to fix from our end. Some applications, and parts of the OS, are saving the display resolution values that they detect when they start up and they are using these saved values when positioning dialogs, etc. later on. When you dynamically change resolution these cached values are not updated. This is why the message box was still being rendered for a 1280x960 screen even though you had switched to 480x640. Ideally programs should get the resolution values every time they need them (it's only 2 lines of code afterall) but alas...