quietly moved three of it's mobile Core 2 Duo processors from the E-1 to the G-0 stepping. The new stepping will ship in the 13th
The three modles concerend are the T7700 (2.4GHz), the T7500 (2.2GHz) and L7500 (1.6GHz) and all three have had added support for 800MHz bus speed.
A BIOS upgrade is needed for the new G-0 stepping CPU's to be recognised as the CPUID has been changed.
No other changes has been made to these CPU's and you can read the Intel Product Change Notification here
(please note that this will open a PDF)