Synchronizing cross platform

I have been running into issues when trying to open a file that was created on a PC on a Mac. When I open the files on the other computer, the synchrony is lost. Is this a platform problem or a problem with Elan? I have not yet tested whether or not the problem occurs when transferring the file from Mac to Mac.

What kind of media files are these? Is there an offset specified in the Media Synchronisation Mode?
I suspect that this must be the result of different media handling on Mac and PC. All time values in the eaf file are stored in milliseconds and these are treated the same by ELAN on PC and Mac.

-Han