Having installed subversion 1.5.1 from the hardy backports into AMD 8.04 it should be noted that there is a known bug that it doesn't work with SSL certificates. There is documented workaround posted here: https://lists.ubuntu.com/archives/ub...er/009158.html. I used solution 2. that involves swapping the libraries around. I am about to attempt a similar thing on 7.10 i386.
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