On our puppetmaster we have three environments setup using modulepaths that aren't /etc/puppet/modules.

In the GUI, if I do:
1) Settings -> Puppet Classes
2) Import New Puppet Classes and Environments

I get a popup error:
"Unable to find directory /etc/puppet/modules in environment production"

Gonna search bug tracker for this issue and am planning an upgrade to trunk to see if maybe it is resolved.