The output of taylor is displayed in the wrong order:
(%i7) taylor(1/(1-x), x, 0, 10);
10 9 8 7 6 5 4 3 2
(%o7)/T/ x + x + x + x + x + x + x + x + x + x + 1 + . . .
(%i8) build_info();
(%o8)
Maxima version: "branch_5_36_base_48_g3ea521e_dirty"
Maxima build date: "2015-05-11 14:23:19"
Host type: "i386-apple-darwin14.3.0"
Lisp implementation type: "SBCL"
Lisp implementation version: "1.2.10"
The displayed series should start with 1 + x + ...
Fixed by commit c585cd6. Closing this report.