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If you removed/renamed any apps when you were rooted, it will fail. Updates check for a stock system and root (or notrooted) doesn't matter. In fact, I updated my rooted system this morning, and then rerooted with Gingerbreak - no probs.It failed for me. I was rooted, I unrooted via Gingerbreak and re downloaded the update and applied it again with no luck. Anyone else run into this?
That's a 3.01 vs. 3.1 discussion. Zero, zip, nothing, to do with the odd update pushed this morning.

You know, I may be imagining things, but with this update my A500 seems a lot more responsive and generally a lot quicker jumping between open apps, scrolling through the HC screens, etc.
Dang. I see nothing there about fixing the "wake out so sleep" issue or the wifi disconnecting in low bar areas. The wifi is probably a non-fixer, but the sleep mode issue should have been covered, since the most common issue.

What??? Just to clarify.
Nobody has got Honeycomb 3.1.
For Countries covered by EMEA_GEN1:
Europe / Asia / China
BEFORE Update
Model number - A500
Model ID - A501
Version - 3.0.1
Kernel - 2.6.36.3
Build - 1.016.04 GEN 1
AFTER SYSTEM UPDATE 1.139.04
Model number - A500
Model ID - A500
Version - 3.0.1
Kernel - 2.6.36.3
Build - 1.139.04 GEN 1
For the rest of the world (...including USA)
AFTER SYSTEM UPDATE 1.141.07
Model number - A500
Model ID - A500
Version - 3.0.1
Kernel - 2.6.36.3
Build - 1.141.07 GEN 1
The Android 3.01 Updates (bug fixes) for Build: 1.139.04 GEN 1 and 1.141.07 GEN 1 are as follows:
1) Native Browser
- Updates for HTML5 support
- New multi-touch support for JavaScript and plugins
- Updates for overflow scrolling
2) Adobe Flash Player update 10.2
- Hardware accelerated video presentation for H.264
- Deeper integration with the Android browser rendering engine
- Enhanced performance for multi-core tablets
- Automatic soft keyboard support
3) Bug fix that addresses daylight savings time and calendar appointments
4) Updates for USB and Bluetooth
Android 3.1 Updates are due late June 2011
The promised features are as follows:
- UI refinements
- Connectivity for USB accessories
- Expanded Recent Apps list
- Resizeable Home screen widgets
- Support for external keyboards and pointing devices
- Support for joysticks and gamepads
- Robust Wi-Fi networking
- Enterprise support
- Updated set of standard apps
+ Browser
+ Gallery
+ Calendar
+ Contacts
cheers
"We are all born ignorant, but one must work hard to remain stupid" - Benjamin Franklin