Pioneer has release version 2.0 of the firmware in their AVIC-F series of headunits (F90BT, F900BT, F700BT). The new firmware is available here and has the following improvements as documented by the AVIC forums:

1. 1. Boot time is a lot faster, its tolerable now. I am so used to waiting the original time it comes up and im like wowa, nice. 30 seconds exactly to music from ipod and screen. 72 seconds from bootup till vr update complete. 102 Seconds from boot for Bluetooth connection and loading complete.
   
2. The screens respond as fast as you touch them there is no lag now, great improved.
   
3. The blue boxes are now gone from the idle no route input map screen. Amazing what a difference this makes in the viewable area. The destination ins deleted now once arrived.
   
4. The screen bright max before is what 7 is now, at 10 its almost blinding! However this isn’t in effect until the unit completes boot up, you suddenly see when it reads the settings the screen comes up much brighter all of a sudden.
5. The contact screen is useful now! It lists them by mobile/office/home now.

In my previous post about the F-series car decks, I recommend not to buy them because of the numerous bugs being reported by users and even videos of it on Youtube.

Pioneer has responded by releasing new firmware for the models that hopefully will improve them. Specifically they address:

Pioneer has become aware that users of the AVIC-F90BT, AVIC-F900BT, and AVIC-F700BT may experience issues with one or more of the following: navigation voice guidance sound quality and reading of guidance information; brightness of display screen; Bluetooth sound quality and hands-free calling; parking brake warning; cataloguing time for voice recognition of iPod content; song order within an album for iPod content; playing of MP3 music files for USB content; volume control for USB and SD content; and, Spanish and French mode operation with an iPod and with navigation voice guidance.