Is a corrupt itunes file causing a kernel panic?

I'll be honest, I know close to nothing about computers. Recently (last week), I was running on Tiger and my imac kept getting that scrolling darkness with a message saying that I needed to restart my computer. Eventually it would not even start up again and at the white boot up screen, it would show a gray circle with a slash through it instead of an apple.

I took it in and they replaced the hard drive (supposedly?) and I got the computer back last Tuesday. Since then, the only files I have put back on my computer are my photos from my back up external, and my music which I took off my ipod using Senuti. And already for the past few days, my computer has again been shutting itself down. Is it possible that it is because of a corrupt file from my ipod that this is happening? That is the only connection I have made between now and before I took my computer in.

Here is what the Problem Report says when I rebooted my computer just now after being shut down unexpectedly. (And oddly it was about 20 minutes into an episode of The Simpsons and I had not even touched the keyboard for at least 15 minutes)

Sorry if this is a repeat post, I searched but I couldn't find the same situation.

Mon Jun 23 08:17:48 2008
panic(cpu 1 caller 0x001A8CD4): Kernel trap at 0x0017e2eb, type 14=page fault, registers:
CR0: 0x80010033, CR2: 0x79656b50, CR3: 0x0102c000, CR4: 0x00000660
EAX: 0x00000001, EBX: 0x79656b3c, ECX: 0x0467e2e8, EDX: 0x064d37a8
CR2: 0x79656b50, EBP: 0x3f45bd58, ESI: 0x00026000, EDI: 0x00000000
EFL: 0x00010206, EIP: 0x0017e2eb, CS: 0x00000008, DS: 0x00530010
Error code: 0x00000000

Backtrace, Format - Frame : Return Address (4 potential args on stack)
0x3f45bb58 : 0x12b0fa (0x459294 0x3f45bb8c 0x133243 0x0)
0x3f45bba8 : 0x1a8cd4 (0x4627fc 0x17e2eb 0xe 0x461fac)
0x3f45bc88 : 0x19ede5 (0x3f45bca0 0x203e1e36 0x3f45bd58 0x17e2eb)
0x3f45bc98 : 0x17e2eb (0xe 0x2e650048 0x3f450010 0x190010)
0x3f45bd58 : 0x17613c (0x64d37a8 0x26000 0x0 0x0)
0x3f45bde8 : 0x16250e (0x64d37a8 0x21000 0x0 0x1)
0x3f45bf58 : 0x1a8f72 (0x448a528 0x18733000 0x0 0x3)
0x3f45bfc8 : 0x19ece6 (0x44466c0 0x0 0x1a20b5 0x44493c0)
No mapping exists for frame pointer
Backtrace terminated-invalid frame pointer 0xbfff9928

BSD process name corresponding to current thread: Safari

Mac OS version:
9D34

Kernel version:
Darwin Kernel Version 9.3.0: Fri May 23 00:49:16 PDT 2008; root:xnu-1228.5.18~1/RELEASE_I386
System model name: iMac5,1 (Mac-F4228EC8)