Like many others, I like to dive right in whenever a new JB is released, safe in the knowledge that I can downgrade and restore my previous configuration fairly painlessly thanks for the wonder of SHSH blobs, iTunes, and pkgbackup!

UPDATE - 11/04 - All good things come to those who wait! I am pleased to report that all of the original problems which were an issue for me personally have now been resolved by their respective developers, therefore I am now updated and jailbroken on 4.3.1. I used sn0wbreeze to create a 4.3.1 custom firmware and did a full backup of 4.2.1 and restore and re-sync using pkgbackup and iTunes. The whole process took a mighty 4 hours start to finish (it takes a long time to re-sync 64GB of Apps and Media!), but it went without a hitch. And now I have multi-tasking gestures back! One happy chappy

The rest of this thread is for historical purposes only.

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I reverted my iPad to 4.2.1 on 05/04 because of a few key compatibility issues related to Cydia apps which need to be resolved before I will be happy on 4.3.1. I'm keeping my phone on 4.3.1 because I can live with it, whereas I cannot live with a less than perfect iPad!

1. Shrink - was not working, but was updated to version 0.9.7 with 4.3.1 support as of 07/04
2. Infinidock - was not working, but was updated to work on 4.3.1 as of 06/04 - Thanks for the heads up AWolfOutWest
3. Themes - Apple, in their ultimate wisdom, have tweaked a few graphics on the OS, most notably for me on the lock screen slider meaning that my favourite themes on phone and iPad don't show as expected. UPDATE 07/04 - Looks like I can get round this by changing the names of themed slider elements to WellLock.png, BarBottomLock.png, WellLock@x2.png,BarBottomLock@x2.png.
4. Action Menu - works fine on 4.3.1, BUT has a dependency on IOS 4.2.1 set on Cydia - updated to 1.1.1-1 for 4.3.1 compatibility on 10/04
5. qTweeter (iPhone) - Although it is no longer available to buy, I absolutely love this tweak. It is not compatible with 4.3.1 and likely never will be as the devs have stopped work on it - I'll just have to live with it, but that's the iPhone anyway!
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and these from AWolfOutWest...
- Pkgbackup 4.2.11 has a confirmed problem which requires a fix from the developer. Updated to version 4.3.0 with bug fixes for 4.3.1 on 11/04.
- 5-row keyboard for iPad was not working, but has now been updated to 1.0-1 with 4.3.1 compatibility on 08/04

- MobileTerminal is working on 4.3.1 but has been incorrectly packaged and constantly prompts that there is an update when there isn't.

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Please feel free to contribute your own!

not sure if it will help with all your problems but if you have the time maybe you could have a little look at the walk round

Celeste Bluetooth 4.3.1 working !

Originally Posted by liverpoolluke

not sure if it will help with all your problems but if you have the time maybe you could have a little look at the walk round

Celeste Bluetooth 4.3.1 working !

Thanks. Editing the plists is exactly how you can get round a simple dependency check (as I did with Action Menu), however you need to take care. Sometimes the app won't work at all, sometimes it will crash springboard constantly, and in extreme cases you may even need to restore. Glad you got Celeste working though!

Look at that fine title.

Originally Posted by SweetPoison

Look at that fine title.

HeHe. Right back at ya!

Originally Posted by GhostWalker

keep up the great work f4780y!

Appreciate it. Thanks.

Originally Posted by GhostWalker

4.2.1 is the place to be. 4.3.1 not woth the time n effort to u
grading to.

But I DO enjoy a good upgrade / downgrade!
Keeps you on your toes and always teaches you something new!

Originally Posted by GhostWalker

unlike some others who all they do is post links, since they have no real clue as to whats going on...lmao you can see them a mile away. keep up the great work f4780y!

What is wrong with links? We use links all the time!

Cydia keeps wanting me to update Mobile Terminal but it won't. I mean it does but Cydia is constantly saying to update it.

Thanks for this thread....was considering upgrading. Not sure why though...everything in 4.3.1 is all in 4.2jb + soooo much more.

And congrats on well deserved title....