I had an previous macbookair and I imported everything from the last copy of Time Capsule. When I try to start Safari, a pop up says that Safari has quit and this is the report coming with it :

Process: Safari [380]
Path: /Applications/Safari.app/Contents/MacOS/Safari
Identifier: com.apple.Safari
Version: 5.1.7 (7534.57.7)
Build Info: WebBrowser-7534057007000000~2
Code Type: X86-64 (Native)
Parent Process: launchd [114]

Date/Time: 2012-10-30 06:36:18.628 -0400
OS Version: Mac OS X 10.7.5 (11G63b)
Report Version: 9

Interval Since Last Report: 2024 sec
Crashes Since Last Report: 7
Per-App Interval Since Last Report: 3 sec
Per-App Crashes Since Last Report: 7
Anonymous UUID: 670453E2-82A9-4C7D-ADE7-2BE084328189

Crashed Thread: 0 Dispatch queue: com.apple.main-thread

Exception Type: EXC_CRASH (SIGABRT)
Exception Codes: 0x0000000000000000, 0x0000000000000000

External Modification Warnings:
Thread creation by external task.

Application Specific Information:
objc[380]: garbage collection is OFF
*** Terminating app due to uncaught exception 'NSInternalInconsistencyException', reason: 'Invalid parameter not satisfying: (index >= 0) && (index < [_itemArray count])'
*** First throw call stack:
(
0 CoreFoundation 0x00007fff8ec77f56 __exceptionPreprocess + 198
1 libobjc.A.dylib 0x00007fff902e8dee objc_exception_throw + 43
2 CoreFoundation 0x00007fff8ec77d8a +[NSException raise:format:arguments:] + 106
3 Foundation 0x00007fff8d8a671f -[NSAssertionHandler handleFailureInMethod:object:file:lineNumber:description:] + 169
4 AppKit 0x00007fff8723362b -[NSMenu itemAtIndex:] + 165
5 AppKit 0x00007fff87233784 -[NSMenu removeItemAtIndex:] + 63
6 Safari 0x0000000100cebede -[AppController awakeFromNib] + 387
7 CoreFoundation 0x00007fff8ec6efb1 -[NSObject performSelector:] + 49
8 CoreFoundation 0x00007fff8ec6ef32 -[NSSet makeObjectsPerformSelector:] + 274
9 AppKit 0x00007fff8721b347 -[NSIBObjectData nibInstantiateWithOwner:topLevelObjects:] + 1245
10 AppKit 0x00007fff872118bb loadNib + 322
11 AppKit 0x00007fff87210db8 +[NSBundle(NSNibLoading) _loadNibFile:nameTable:withZone:ownerBundle:] + 217
12 AppKit 0x00007fff87210cd3 +[NSBundle(NSNibLoading) loadNibFile:externalNameTable:withZone:] + 141
13 AppKit 0x00007fff87210c16 +[NSBundle(NSNibLoading) loadNibNamed:owner:] + 364
14 AppKit 0x00007fff87481cd7 NSApplicationMain + 398
15 Safari 0x0000000100ef235a SafariMain + 166
16 Safari 0x0000000100cd6f24 Safari + 3876
)

terminate called throwing an exception
abort() called

Thread 0 Crashed:: Dispatch queue: com.apple.main-thread
0 libsystem_kernel.dylib 0x00007fff8db3dce2 __pthread_kill + 10
1 libsystem_c.dylib 0x00007fff86de87d2 pthread_kill + 95
2 libsystem_c.dylib 0x00007fff86dd9a7a abort + 143
3 libc++abi.dylib 0x00007fff8e6b47bc abort_message + 214
4 libc++abi.dylib 0x00007fff8e6b1fcf default_terminate() + 28
5 libobjc.A.dylib 0x00007fff902e9249 _objc_terminate + 94
6 libc++abi.dylib 0x00007fff8e6b2001 safe_handler_caller(void (*)()) + 11
7 libc++abi.dylib 0x00007fff8e6b205c std::terminate() + 16
8 libc++abi.dylib 0x00007fff8e6b3152 __cxa_throw + 114
9 libobjc.A.dylib 0x00007fff902e8f0a objc_exception_throw + 327
10 com.apple.CoreFoundation 0x00007fff8ec77d8a +[NSException raise:format:arguments:] + 106
11 com.apple.Foundation 0x00007fff8d8a671f -[NSAssertionHandler handleFailureInMethod:object:file:lineNumber:description:] + 169
12 com.apple.AppKit 0x00007fff8723362b -[NSMenu itemAtIndex:] + 165
13 com.apple.AppKit 0x00007fff87233784 -[NSMenu removeItemAtIndex:] + 63
14 com.apple.Safari.framework 0x0000000100cebede -[AppController awakeFromNib] + 387
15 com.apple.CoreFoundation 0x00007fff8ec6efb1 -[NSObject performSelector:] + 49
16 com.apple.CoreFoundation 0x00007fff8ec6ef32 -[NSSet makeObjectsPerformSelector:] + 274
17 com.apple.AppKit 0x00007fff8721b347 -[NSIBObjectData nibInstantiateWithOwner:topLevelObjects:] + 1245
18 com.apple.AppKit 0x00007fff872118bb loadNib + 322
19 com.apple.AppKit 0x00007fff87210db8 +[NSBundle(NSNibLoading) _loadNibFile:nameTable:withZone:ownerBundle:] + 217
20 com.apple.AppKit 0x00007fff87210cd3 +[NSBundle(NSNibLoading) loadNibFile:externalNameTable:withZone:] + 141
21 com.apple.AppKit 0x00007fff87210c16 +[NSBundle(NSNibLoading) loadNibNamed:owner:] + 364
22 com.apple.AppKit 0x00007fff87481cd7 NSApplicationMain + 398
23 com.apple.Safari.framework 0x0000000100ef235a SafariMain + 166
24 com.apple.Safari 0x0000000100cd6f24 0x100cd6000 + 3876

Thread 1:: Dispatch queue: com.apple.libdispatch-manager
0 libsystem_kernel.dylib 0x00007fff8db3e7e6 kevent + 10
1 libdispatch.dylib 0x00007fff87e19786 _dispatch_mgr_invoke + 923
2 libdispatch.dylib 0x00007fff87e18316 _dispatch_mgr_thread + 54

Thread 2:
0 libsystem_kernel.dylib 0x00007fff8db3e192 __workq_kernreturn + 10
1 libsystem_c.dylib 0x00007fff86de8594 _pthread_wqthread + 758
2 libsystem_c.dylib 0x00007fff86de9b85 start_wqthread + 13

Thread 3:
0 libsystem_kernel.dylib 0x00007fff8db3e192 __workq_kernreturn + 10
1 libsystem_c.dylib 0x00007fff86de8594 _pthread_wqthread + 758
2 libsystem_c.dylib 0x00007fff86de9b85 start_wqthread + 13

Thread 4:
0 libsystem_kernel.dylib 0x00007fff8db3c67a mach_msg_trap + 10
1 libsystem_kernel.dylib 0x00007fff8db3bd71 mach_msg + 73
2 libsystem_kernel.dylib 0x00007fff8db3c274 mach_msg_server + 473