Okay, now I'm confused.
In another thread about fixing lost TTS functions, Stephanie (goddess of the F-series hackery) posted a link to the update installation instructions on Pioneer's website, and I took a look, and I see directions that are quite different than the ones I used. I downloaded the update the first day it was released, on July 21st. I actually didn't get around to INSTALLING the F-series until recently though. When I installed it, I used the update that I downloaded 7/21.
The instructions I downloaded then didn't have a TTS folder at the top level, and the TTS functions display themselves differently in the UI (according to the new instructions.) BTW, I don't actually have a TTS problem, but ... the instructions changed, so maybe the actual update did too?
So, I downloaded the update again. I still have the zip file from the first update I downloaded a month ago, so I compared them. They are definitely different.
I looked at the text files in the zip archives. I found only one difference, in LPUE080\LPUE080APL.htm:
First update: downloaded 7/21
[2008 Navigation Application Release Record]
Product : AVIC-F500BT/F700BT/F900BT
20080714 16:43
Release File : APL
Release Version : 1.001700 20080714
Second update: downloaded 8/21
[2008 Navigation Application Release Record]
Product : AVIC-F500BT/F700BT/F900BT
20080723 11:38
Release File : APL
Release Version : 1.001700 20080723
It looks to me like there was a second built 7/23, two days AFTER the first update was released. Did I miss something and everyone knew this? It's the same version number -- will the system apply this update? I'll try it tonight.
As for other easy-to-find differences:
The first update has MiTACAP and Testmode directories that are not in the 2nd update. The second update has a TTS directory that is not in the first update.
I will try to figure out the which binary files changed, if any.