Is your Pioneer AVIC-F Series navigator acting up?

We aren't suggesting that these problems are widespread or anything, but a fair number of users over at AVIC411 seem to be having all sorts of issues with their (admittedly pricey) F-Series navigators. According to owners, the issues range from complete lock-ups to distorted voice commands to quirky iPod interactions -- and that's just the tip of the iceberg. Have any of you taken the plunge only to find a litany of problems after installation? Or is your unit humming along just fine? Chime in below and let us know what's up.