Python Strangeness: int() and XSI frame number

[Bradley Gabe]

Opening a new XSI scene, the frame range is set from 1 to 100 by default.
If I run the following Python code:

print Application.GetValue("PlayControl.Out")

the output is 100.0


if I try to directly convert it to an integer:

print int(Application.GetValue("PlayControl.Out"))

the output is 99

Anyone know what is going on?