Why does my Samsung Galaxy S lose data for some applications? ANYONE WANTS MY BOUNTY POINTS ?

I had a bounty of 150 points on this question but got no answer I could use.

Anyone ? I have to award it in 22 hours.



I am very happy with my Galaxy S, which I have had for about a year now.

Recently I noticed that some of the installed applications seem to lose data.

Because I do not know the file system nor the inner working of an Android device, I will give the specific apps in the hope that someone recognizes this or at least can tell me something to try.


The first program I noticed was Friend Caster. This is a (very good) Facebook client which worked fine for some weeks. But now I have to, at least once a day, re-enter my user id and password. The technical staff helped with some things to try (related to the Facebook integration), but nothing helps.
The second program I noticed was Business Calendar Free. Every once in a while (and I really can't put my finger on why) this program starts up as if it is just installed - i.e. it produces the start help screen, and I lose the settings I chose (f.i. the chosen colours for Saturday and Sunday). Although the installed and active calendars are kept. Also, the widgets of this program, stop updating themselves, which is rather useless for a calendar widget, of course :)


I have lots of other programs installed, all of those seem to work correctly. None of them has an obvious function which could cause this.

Samsung Galaxy S - GT-I9000 - Firmware 2.2.1 - Kernel 2.6.32.9 -  phone is not rooted

The problem can be specific to those two program of course, so I also installed both of them on my son's Galaxy S, on my wife's LG and on my Archos 101 tablet. None of these phones present the same problem.

UPDATE

I have upgraded my Android version to version 2.3.3, but this has not solved the problem.

Any help would be greatly appreciated.

UPDATE 2

I received the following answer from the nice guys from the Business Calendar support. Can anybody verify this ( or knows a solution to the problem ):


  This is a well known problem on some Samsung devices, since the update
  of Android version 2.2.1. The settings of some apps are not saved
  permanently. Once this problem occured, this will happen again and
  again.
  
  As the problem seems to be caused by a bug in Samsung's version of the
  Android OS I am afraid to say that we can't do anything against it. We
  hope that Samsung is about to fix the reason of this in the future.
  Maybe you can contact the Samsung support, that they hopefully
  accelerate working on that issue.
  
  So unfortunately your device is affected by this problem. Some people
  told us that a factory reset helps them out of this really annoying
  problem, but I won't guarantee for anything. That's up to you.
It may actually be a Samsung problem.  Here's a similar problem report (app on Samsung becomes forgetful) with DropBox: http://forums.dropbox.com/topic.php?id=37207

The DropBox folks claim they fixed it (though perhaps they just worked around it).  I couldn't find any details, so it may not be the same underlying mechanism as the apps you're having problems with.

Assuming the apps in question store the login data in an sqlite database internally, here's a SO question about a similar problem:
https://stackoverflow.com/questions/5886019/android-application-samsung-galaxy-tab-2-2-does-not-sometimes-write-to-the.  Sadly, it is currently unanswered.

The Samsung developer website does not have any mention of sqlite or persistence problems that I could find.  (But there isn't a whole lot there.)