New installers for OpenAFS for Windows pre-1.4.1 with Byte Range Lock support have been uploaded to http://web.mit.edu/jaltman/Public/OpenAFS/ByteRangeLocks/.   The latest builds are dated 20051006.   These builds fix two issues related to lock management.  I am now confident that I can use this version on a daily basis.  Perhaps we should skip the 1.4.0 release.