In:
LogLinearPlot[Log[10, x], {x, 10^-10, 10},Ticks -> {myTicks, Automatic}];
myTicks is not evaluated to a list of anything; it's just a symbol. If you evaluate:
myTicks[10^-10, 10]
you get:
{{100, -2}, {1, 0}, {1/100, 2}, {1/10000, 4}, {1/1000000, 6}, {1/
100000000, 8}, {1/10000000000, 10}}
which is a list. Don't know about Version 9, but The error message for p2 with Version 10 means exactly what it says. It seems that the code below supports my interpretation.
myTicks[x1_, x2_] := {10^-#, #} & /@ findDivisions[{x1, x2}, 10]
Head[myTicks]
Symbol
But, this does work:
myTicks[min_, max_] := Table[i, {i, Ceiling[min], Floor[max], 1}]
LogPlot[x^2, {x, 0, 10}, Ticks -> {myTicks, Automatic}]