On a French system, one cannot edit Game Center settings (country, emails, and more importantly, confidentiality -- if your profile is public, you can't switch it to private).
Steps to Reproduce:
Setup iOS in French.
Go to Game Center.
Touch the mail address (it has to be already configured).
Choose to view the account.
Try using one of the following actions:
change email address
Additional note : there is no Save button on the upper right corner.
A solution to perform changes is to switch the system to English and when done, switch it back to French.
[crarko adds: I haven't tested this one. I presume this affects other non-English language localizations as well, and they would use the same workaround, until Apple improves on international support for Game Center.]
In the latest version of Safari for iOS, pressing and holding the add tab [+] button will show a list of recently closed tabs. Touching one of the listed pages will open it in a new tab.
[crarko adds: I tested this, and it works as described, although it seems a bit inconsistent in how it handles the list. Closing Safari with no open tabs clears the list, but if there are tabs still open the list is maintained. Actually quitting Safari (clicking the 'X' in the multitasking bar) clears the list whether there are tabs still open or not.
Note: As mentioned in several of the comments, this only works on an iPad.]
I'm using the iPad 2's 10 Watt wall charger and wireless sync, and it works very well. The only thing that kept bothering me was how to tell how much the battery was charged without unplugging it.
Here's how: If you have the iPad's screen locked, press and hold the Home button. After a few seconds the battery charge percentage will show up next to the 'Charging' icon in the top right of the screen.
[crarko adds: I tried this with a first-generation iPad and it did nothing. However, going to Settings » General » Usage and turning on the 'Battery Percentage' slider makes the charging level always visible. Does the iPad 2 behave differently?]
There is no easy way to mass delete some (but not all) photos from the Camera Roll from the iPhone. Here is the solution I found.
Before iOS5, I'd never used the iTunes app to sync my photos. Instead, I've used the highly rated app called PhotoSync (wireless sync for iPhoto/iPhone). When doing this, my iPhone collected many photos, all 1561 of them and never deleted them. The solution was to mount the iPhone as a camera in Apple's Image Capture application. This allowed me to select my 1000 photos I didn't want and delete them with ease.
[crarko adds: Once again, Image Capture comes to the rescue. Note that iPhoto will either let you keep or delete all the images on an import, but doesn't give much choice beyond that.]
iOS 5 introduced Private Browsing, which can be set via Settings » Safari.
To tell whether you have Private Browsing turned on when using Safari on an iOS device, the chrome around the browser window will be black. When Private Browsing is turned off, it's the standard bluish-gray.
[crarko adds: A useful find, and I admit I hadn't noticed the addition. I always used a third party browser if I wanted this feature.]
The old tap and drag to mass select photos has been reassigned to rearranging photos. So it isn't obvious how to select large groups of photos anymore. Many people have commented on the Apple Discussion Forums having trouble with this.
The new method is simple but not so intuitive. Just use two fingers, close together to tap on a photo, hold for a second and then drag across all the photos you want to select.
It works just like the old method, just needs two fingers instead of one.
[crarko adds: I tried this with the iPhone but I think you'd need far smaller fingers than mine to do this.]