Broken libxml2 on Mac OSX 10.5.8

While installing the latest version of libxml2 I managed to remove the system install of the library.

My install is under /opt and works fine, however of course many programs rely on the system version开发者_高级运维 and now the programs (such as colloquy and calibre) crash on launch.

Is there a way to re-install the system version of the library without completely formatting the Mac?

Thanks, Chris

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Closing off, this was some time ago and in the end I cleaned everything up and formatted.