Strange that i don't experience the caller ID problem. my contacts appear just as they should either from calls or sms. before getting the X10 mini i already knew about the +601XX... issue so i decided to take the safe but rather long and painful route of of keying in the contacts..
i transfered all my contacts from my nokia (through copy and paste) on the pc to
SE website (u get to access the website thru SE PC Companion).
all copied contacts were added with the +6 prefix. (i decided to copy only those numbers which are important. a good time to clean up ur contacts

)
once every contact was keyed in (on the website), i used the
Sync app on the X10 mini to sync the contacts between the X10 mini and the SE website.
it worked like a charm. fyi i do from time to time save contacts directly on the phone every time an unknown number (from calls and sms) showed up on my mini with no issue.
just wondering, have u updated ur phone recently? ur phone
Build number should read
1.1.A.0.8 (after updating). heard that the Build managed to iron out the +6 prefix issue.
that's how i did it bro.. hope it can shed some light on ur predicament.
Added on July 30, 2010, 9:39 amhow i tested the multitasking.
1. launched Peggle (a game). played it / push home button while the ball is still bouncing..
2. launched Roller Coster (a game). played it / push home button while the game is still running.
3. launched another app / pressed home button (i don't have many games installed

)
4. launched another app / pressed home button
5. launched another app / pressed home button
6. launched another app / pressed home button
7. launched another app / from this step, i long pressed the home button, Peggle (the 1st app) no longer appeared on the multitasking window. so decided to launch the app from the menu. lo and behold, the game did not continue from where i left of (remember the bouncing ball?). the game simply started all over again.
if i were to launch another app (no. 8) then Roller Coster will be killed by android. if follows the sequence.
Symbian apps are just lame.. that's why we are on andriod right?
Let us know how ur battery test turns out.
You wont see the 1st and 2nd apps you open in the "last 6 open apps" when you press the home button for a few second after you open more than 6 apps. But, if you go and open these 1st 2 apps which dont appear in the last 6, you will notice you will continue from where you left them.
The last 6 apps is just shows the last 6 apps. But, it doesnt mean those you open earlier were killed. They are still running. Try it. you will understadn what I mean.