I am suspecting one of the app update causing a problem on my Galaxy S2 after I did a app update (about 15 apps) through Android Market. Is there a way to find out the app updating history (dates/app names/versions)?
Go to your web browswer - not on the phone - use a desktop or laptop (you might be able to do this via phone but haven't checked - you would probably need desktop mode if you wanted to try) - and go to the Android Market: https://market.android.com/ Log in Between the Search bar and Android Market you should get the following options Apps, Books, Movies and My Library - click on My Library. Just under the search option you should see Purchase History. Click on it. You should find a list of the apps and when they installed. This will help you pick up any apps etc that are new.
To see the most recently updated apps just go to the Market app on your phone, go to my apps (my downloads - depending on the version of your app market) and it will list them in the most recent order of updated/installed - with any requiring an update at the top - scroll past these to see the last ones you updated (if any has an error its possible it might be in the apps to update).