Itunes crashes on me after update 10.5

[ddiMac]

Hello everybody

Itunes quits unexpectedly as it opens. I tried various things and I believe it is a library related problem. However you may know more, here is the crash code:

Thread 21 Crashed:
0 libSystem.B.dylib 0x94d8f0ee __semwait_signal_nocancel + 10
1 libSystem.B.dylib 0x94d8efd2 nanosleep$NOCANCEL$UNIX2003 + 166
2 libSystem.B.dylib 0x94e09fb2 usleep$NOCANCEL$UNIX2003 + 61
3 libSystem.B.dylib 0x94e2b6f0 abort + 105
4 libSystem.B.dylib 0x94d28575 free + 129
5 com.apple.CoreFP 0x04b7ade1 YlCJ3lg + 496849
6 com.apple.iTunes 0x00983d32 0x1000 + 9973042
7 com.apple.iTunes 0x00013c78 0x1000 + 76920
8 com.apple.iTunes 0x009d59c2 0x1000 + 10308034
9 com.apple.iTunes 0x0091e4b8 0x1000 + 9557176
10 com.apple.iTunes 0x006a9fdb 0x1000 + 6983643
11 com.apple.iTunes 0x0014bae9 0x1000 + 1354473
12 com.apple.iTunes 0x0014b316 0x1000 + 1352470
13 com.apple.iTunes 0x0013de21 0x1000 + 1297953
14 libSystem.B.dylib 0x94d4f259 _pthread_start + 345
15 libSystem.B.dylib 0x94d4f0de thread_start + 34