This isn't so much a bug with zsh-completion (it could happen with any third party completions). The problem is this: If you happen to compile your functions (zcompile). Then the functions added by zsh-completion will not be made available to your shell, that is until you delete .zcompdump{.zwc} and recompile. With zsh-completion installed and site-fucntions in my $fpath the new completions were not recognized until I had deleted .zcompdump{.zwc}, restarted the shell and recompiled the .z*.{zwc} Similarly to the update from (if my memory is correct) zsh 4.1 to 4.2 there is very little that the package manager could do in this regard, but it's maybe a good idea to add this to the README or to pass this information to the user during install in the form of and einfo.
Thanks for your suggestion. I added einfos to zsh-completion ebuilds. If you notice any other things to improve zsh packages, please let me know :)
