newsgroup より転載
> After careful consideraion we have decided to go gold with the Open
> Watcom 1.0 RC2 release. Hence we have simply renamed the RC2 binaries as
> 1.0, and will be putting out the press release and emailing people on
> the mailing list shortly (thankfully we managed to recover about 4,000
> names on the list!). If you already have RC2, there is no point
> downloading the final release binary as it is identical.

1.0はRC2と同じものなので、RC2をDLした人は改めて1.0をDLする必要はない
と言うことですな。