Screen becomes black after released calls

[#1]

In the latest SW before the now active  (4.0.2.A.0.42/downloaded today) one strange problem has occured several times;

After releasing a call the screen becomes black!

The only way to have the screen back is to do a power reset by release the battery/reboot OR connect external power to the phone.

Sometimes the screen appear after 15 s (1 of 10 times)

When the screen becomes black the white leds beside the Home/Menu button is on until anything of the actions above are performed...

Is this a known problem and can I expect better performance in this new SW release 4.0.2.A.0.42??

The problem has been shown both with Bluetooth (SonyEricsson original) and without...

Reg Haakan

[eff]

My xperia arc is going black after I have received a call.  When the call ends the screen goes black but there are 2 little lights either side of the home button.  The only way to get the phone going again is to remove the battery and restart it all.  

Mty software says it's up to date. 

I looked at solutions on here and, because I'm not very technical, I tried the easiest solution first - "turn off auto rotate". 

Bizarrely this works.  

I can live without it , but is there any way I can have autororate back again?  I assume it's a software problem or something?  I'm hopeless at doing anything technical to my phone!

I also have a problem with phone memory but I'll post that separately!