With respect to the Custom Function reassign options on the 5D Mark III, I saw one that Neuro suggested and that was to reassign the DOF button to One Shot > AI Servo and visa versa. After setting this up and pressing the "Q" button I noted all the settings including One Shot as displayed on the screen. However pressing the DOF button did not alter the One Shot mode on the back menu via the Q button. In calling Canon this is apparently is now a bug as you can only see this toggle occur on the Top of the camera or by pressing the INFO button 3x. I guess its not safe to say 2 out 3 ain't bad. The tech took the report I had offered and listed it as a flaw and hope we see this update in the firmware forthcoming.
Onto the GP-E2 (GPS) - I've noted this phenomena several times where the time stamp on the camera has been altered by an hour when the GPS is connected. Of course one has to supercede the other..either the camera time or the GPS clock. Basically with the correct time zone and DLS "on" the clock goes off by an hour. I ultimately opted to go into the GPS settings and turn off Daylight Savings time and this seemed to cure the issue. The tech was able to repeat this same issue and advised I turn daylight savings back on in the spring. Not so. That defeats the whole purpose of DLS to begin with. This is clearly a bug. He ultimately agreed when I presented "my PC is on DLS I don't ever mess with that time why should I have to do this with your GPS device"? I hope in this next firmware release we will see resolutions to both of the above issues.
Onto the GP-E2 (GPS) - I've noted this phenomena several times where the time stamp on the camera has been altered by an hour when the GPS is connected. Of course one has to supercede the other..either the camera time or the GPS clock. Basically with the correct time zone and DLS "on" the clock goes off by an hour. I ultimately opted to go into the GPS settings and turn off Daylight Savings time and this seemed to cure the issue. The tech was able to repeat this same issue and advised I turn daylight savings back on in the spring. Not so. That defeats the whole purpose of DLS to begin with. This is clearly a bug. He ultimately agreed when I presented "my PC is on DLS I don't ever mess with that time why should I have to do this with your GPS device"? I hope in this next firmware release we will see resolutions to both of the above issues.