OK dumb question, how can I tell if they are on backwards? I guess a simple pic of the board with them on correctly will show that too.
On mine C105, C106 and C107 has the blue side of the cap away from +.
Example: With CPU board oriented with CPU at top left, C106 has blue side of cap to left of board.
EDIT
On another board I see the caps are indeed in wrong in relation to silk screening! So now I am left wondering which board is correct!!! LOL
EDIT V2
You can verify this by locating position U103, just below the oscillator. Vcc (5V) and G(nd) should be printed on the device. Check using an ohm meter for a connection between VCC and the black side of the capactors, similarly check for a connection from G to the other side of the capacitors.
http://amiga.serveftp.net/A3640_capacitor.html
