I too love YAML and use YAML.pm often, though I do think I might switch to the inifiles modules when I don't need to serialize Massive Convoluted Datastructures (TM). What are these bugs you speak of? Well, yes, CPAN has a 'bugs' section listed for YAML, though it mostly seems to list things that just aren't implemented yet. Nothing that would reach out and bite you really.
Comment on Re: Re: Saving application configuration to files
Look for example at the two items in the "important" section (one of them is mine). These are problematic if you're serializing/deserializing arbitrary data. On the other hand, if zou're just using a configuration file with fixed keys and relatively simple values (with no newlines, for example), then YAML should be fine.