addendum Re: Possible softupdates bug when a indirect block buffer is reused

[Matthew Dillon]

    Addendum:  My user reports that the problem also occurs on 
    FreeBSD 4.10 and 4.11, on uniprocessor builds (other builds
    and 5.x/6.x have not been tested).

    I took a look at the 4.x and 6.x softupdates code and didn't see any
    commits that might address the problem.

    This adds weight to the likelihood of it being a softupdates bug of
    some sort, possibly still present in 6.x.

						-Matt