IntOp 5000 + 025 = 5021!
IntOp doesn't seem to be able to add up correctly if one of the values has a leading zero.
I could remove the leading zero, but I would have thought it should ignore them, instead the calculation result is wrong.
This is with NSIS 2.29 on my work PC. I'll try at home and see if I get a different result.
Regards,
sab0tage