So I've seen several posts say that installing Guest Additions for VirtualBox 4 running Ubuntu (host is Windows 7) should allow you to set a resolution higher than 800x600. There is also this answer on SuperUser, but the last comment says its deprecated for VB4.
I have installed guest additions, but the max resolution is still 1024x768. I want to up it to at least 1280x1024. I have set the display memory for the box at the max of 128.
Is this just as good as it gets, or am I missing something?