I said:
>
> Greetings and salutations.
>
>So i'm currently seeing a problem with compiling libpng from pkgsrc:

[smip]


FWIW, further inspection has revealed that sourceforge (the first archive
site) was returning HTML instead of the tarball, which was the cause of
the checksum errors. When i removed it from the list of sites, the make
went just fine. I've notified the package maintainer.

 I would still appreciate information explaining the best procedure for
correcting checksums. This was the second pkgsrc that i had a checksum
problem after installing about 20 over the last 2 days.

(And it'd also be cool to look at upgrading libpng, because there is a
 security advisory for anything < 1.2.4.)


 --johan