Help Random Restarts

[galesjam]

My wife's Galaxy W randomly restarts around once a day. It can either be in use and then stop working and restarts, or it restarts when not in use.

The phone has been factory reset and still the problem happens. So I don't think it's app related. The battery is fine and the memory (RAM) appears sufficient. A restart from today shows these events (logcat) just before/after the crash...

10-15 07:44:00.827 I/power_screen_state( 6809): [0,3,0,0]
10-15 07:44:00.827 I/power_screen_broadcast_send( 6809): 2
10-15 07:44:00.827 I/screen_toggled( 6809): 0
10-15 07:44:00.837 I/am_pause_activity( 6809): [1082119320,com.sec.android.app.twlauncher/.Launcher]
10-15 07:44:06.532 I/dvm_gc_info(29683): [8607350278208964190,-8951883132419885010,-4009183297513170902,0]
10-15 07:44:08.504 I/battery_level( 6809): [99,4,270,930]
10-15 07:44:11.567 I/dvm_gc_madvise_info(29683): [655360,499712]
10-15 07:44:13.519 I/battery_level( 6809): [99,4,270,932]
10-15 07:44:18.524 I/battery_level( 6809): [99,4,270,933]
10-15 07:44:20.926 I/am_broadcast_discard_filter( 6809): [1082849368,android.intent.action.SCREEN_OFF,12,1084956064]
10-15 07:44:20.976 I/am_anr ( 6809): [22219,com.sec.android.app.twlauncher,572997,Broadcast of Intent { act=android.intent.action.SCREEN_OFF flg=0x40000000 }]
10-15 07:44:21.177 I/dvm_gc_info( 6809): [8320808730291898181,-8908527668951877494,-3875482683575609302,10668586]
10-15 07:44:21.817 I/dvm_gc_info( 6809): [8320808730291992211,-8962852339457038201,-3875482683575609302,10668586]
10-15 07:44:26.011 I/binder_sample( 6918): [com.android.internal.telephony.ITelephonyRegistry,4,2543,com.android.phone,100]
10-15 07:44:26.882 I/dvm_gc_madvise_info( 6809): [704512,499712]
10-15 07:44:28.544 I/battery_level( 6809): [99,4,270,932]
10-15 07:44:33.559 I/battery_level( 6809): [99,4,270,933]
10-15 07:44:38.564 I/battery_level( 6809): [99,4,270,934]
10-15 07:44:43.578 I/battery_level( 6809): [99,4,270,935]
10-15 07:44:53.598 I/battery_level( 6809): [99,4,270,936]
10-15 07:45:03.618 I/battery_level( 6809): [99,4,270,937]
10-15 07:45:18.643 I/battery_level( 6809): [99,4,270,938]
10-15 07:45:28.662 I/battery_level( 6809): [99,4,270,939]
10-15 07:45:32.416 I/watchdog( 6809): com.android.server.WindowManagerService
10-15 07:45:43.697 I/battery_level( 6809): [99,4,270,938]
10-15 07:45:48.702 I/battery_level( 6809): [99,4,270,939]
10-15 07:45:49.022 I/dvm_gc_info( 6809): [8320808730292029073,-8991844262058235769,-3875482683575609302,10668586]
10-15 07:45:49.082 I/dvm_gc_info( 6809): [8320808730291836392,-9060242681398925174,-3875482683575609302,10668586]
10-15 07:45:49.142 I/dvm_gc_info( 6809): [8320808730291867648,-9223216555441887093,-3875482683575609302,10668586]
10-15 07:45:49.213 I/dvm_gc_info( 6809): [8320808730291873332,-9221527705581623160,-3875482683575609302,10668586]
10-15 07:45:49.803 I/boot_progress_start(30124): 215347824
10-15 07:45:50.193 I/boot_progress_preload_start(30124): 215348218

Any ideas what this might be or what's causing it?