libpng 1.5.0 has issues and is breaking builds (but it's not in macports)

[Ryan Schmidt]

On Jan 18, 2011, at 14:02, Bradley Giesbrecht wrote:

> I need to get my system back to a functional state.
> 
> How can I revert all the software that was upgraded in the last "port upgrade outdated" command to the last version before the update?

"sudo port activate" the older versions of the affected software.

Or you could also restore from your regular machine backup system, e.g. Time Machine.