truetype windows fontlab

Monospaced rendering as not monospaced on Windows


(I originally posted this in the FontLab support forum, but y'all are pretty active here, and I'm in a bit of a panic mode, so pardon the bad habit.)

Hi folks, I'm having a strange issue with a monospaced TrueType font on Windows, and I'm wondering if anyone will have seen something like this before.

The custom font in question is designed to match a different custom font, and the metrics are supposed to match exactly.

On Windows 7, the font renders as non-monospaced, with more space given to certain characters (o, L, P). Additionally, certain characters seem to be dramatically shifted within their bounding box, such that they run into their neighbors (particularly the uppercase i). There's also too much leading. On a Mac, everything shows up fine, properly monospaced.