After a lot of searching, i have discovered that Apple ensures that all memory modules meet their timing requirements by not POSTing if incompatible memory is installed in the system and that it is very important that Mac users should only use memory that's specifically made for the Mac.

Because all Macs configure their memory timings based on the SPD that Apple specifies, all memory is configured to have the same timings regardless of what the modules are capable of - in other words, all Mac memory performs the same!

This would explain why Ianxxx suggestion of playing with the ram timings seems to work.

@Agrafuse: Open up terminal and type 'top'. This gives the terminal equivalent of Activity Monitor. Keep that open and when you start to get the -10810 error have a look to see how many processes are running, you should be running 55-80 on average. If the amount has sky rocketed you should be able to see the offending process.

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 Mac OS X 10.6.4 Retail || Intel Core2 Duo E8200 2.66GHz || Gigabyte G31M-ES2L || GeForce 6600 GT 128MB || Realtek ALC883 Audio || Realtek RTL8169 LAN || Samsung SpinPoint F1 1TB HD || Sony Dual Layer IDE DVD RW DW-D22A || Apple Aluminium Keyboard || Mighty Mouse

 MacBook Pro || 2.4Ghz Core 2 Duo || 200Gb HD || 2Gb Ram || NVIDIA GeForce 8600M GT

 iPhone 4 || 16Gb