I did the hourglass tutorial but I can't get the uniform texture and material for the glass part to save. The file saved correctly before that point in the tutorial, but when I try to save after doing that bit it gives me a "scene has been modified" warning and when I click save it keeps giving me the warning every time I try to exit the program. If I choose don't save instead it obviously doesn't save the changes I've just made (i.e. the glass stuff). Perhaps I missed something in the tutorial. I am running Windows 7 SP 1 64-bit, though I tried to run AOI in XP SP3 compatibility mode but this did not fix the problem; neither did re-downloading/re-installing java. I've attached the file if that helps.
In addition, the .tmp file for this scene is 0 bytes according to Windows explorer. When opened with AOI, it's just a blank file (as if I had just started AOI without opening anything).
Please tell me if I have not provided enough info to solve the problem. My email: firstname.lastname@example.org