I have found that all my published projects work fine under A7 Commercial 7.66 and 7.70 on my XP PC.
The reason for the post? - Well I have found that the 'published CD' runs fine on my Windows 2000 PC when published with 7.76 won't run (need DirectX 9.0c error) under 7.70.
DirectX 9.0c is on the 2000 machine but it appears thats now not good enough! - The problem was fixed by updating to the latest version of DirectX 9.0c released in Nov 2008!