Looking at a list of 'My Bugs' shows featurezillas which include information like 'Enhancement' and similar values as per bugzilla bugs. But when you look at a FZ bug specifically, there is no such option. There are priority and severity fields, but they have different values than those which show up in the 'My Bugs' page. (like P1-P3, and A-C) This makes it difficult to be sure how things will show up when you change something, and makes it difficult to know how to change it from (for example) 'high' to 'enhancement' in the severity field. Seems to be always reproducable, although I'd not noticed it before now. (seems to be in beta2 as well as in the production version of bugzilla)
Currently frontpage.cgi treats everything as Bugs and doesn't care which are features or not. All priorities and severities in FZ under surface are mapped to normal BZ priorities and severities. I will need to make some cosmetic changes to frontpage.cgi to compensate for this.
Featurezilla (aka Feature Tracker) is no longer used. Product features are not tracked in Bugzilla proper using flags, trackers, etc.