Python 2.5, problems reading large ( > 4Gbyes) files on win2k

[paduffy at cisco.com]

Folks,

I've a Python 2.5 app running on 32 bit Win 2k SP4 (NTFS volume).
Reading a file of 13 GBytes, one line at a time.  It appears that,
once the read line passes the 4 GByte boundary, I am getting
occasional random line concatenations.  Input file is confirmed good
via UltraEdit.  Groovy version of the same app runs fine.

Any ideas?

Cheers