This topic led me to an ugly discovery. I used to have 2.3.3 on my Optimus, now have 2.3.6 on my Ascend 2. Settings in the newer OS have Preferred Install Location, offering (a) Internal device storage, (b) Removable SD card, or (c) Let the system decide.
I had it in (c), but decided to see what’d happen if I switched to (b). Sure enough, it didn’t move installed apps but let me move them – even widgets. And just as I suspected, all the widgets broke. I had switch back to (c), move everything back to internal and then see what could go back to SD. Then I had to reconfigure all the widgets.
Why the ... do they even offer choice (b) if there’s no way it would work?