Hi,
I wanted to report a bug, which occurs when a part is reloaded via the automatic reload detection any mirroring of the mesh is lost.
To repeat
1. Import some model
2. Duplicate the model
3. Mirror the duplicate along the X axis
4. Change the model on disk, when prompted, click 'Yes' to reloading the model from disk
5. Notice that the reloaded mirror-ed model is no longer mirrored.
Thanks,
Dave