Having discovered the n-gage application buried in Applications/Media folder, I have not been able to launch it, I receive a "system error" message. Any ideas how to make n-gage work on the E75?

I can't offer any help I'm afraid but you're not alone. I bought my E75 yesterday and have exactly the same problem.

Have tried re-booting, removing memory card but I get system error every time. This problem existed before I loaded any other software on the device so I'm ruling out any software conflicts.

Very disappointing.

On another note - I have dust under my screen. It was there when I left the shop. Will be taking this one back...

N-Gage works on my E75.

N-Gage version that was preinstalled: 1.10(1385)

Phone firmware version: 100.48.78

I downloaded Prince of Persia from the 'Download software' link and the N-Gage client now works. Odd.

I have just upgraded to version 1.20(1459) and n-gage is now working on my E75.