iTunes crash adding PDF files to library

Windows 7 Professional SP1 x64 4 Gb RAM

iTunes 10.7.21 x64

For months I've imported my PDF files to iTunes via "File\Add Files To Library" without any problems, now some files make iTunes to crash.

I've isolated this PDF files (3 or 4 on 100), but I don't understand which is the cause because I've already imported before.

It drive me mad!! 😕

This is the error and Windows crash report:

---------------------------
Microsoft Visual C++ Runtime Library
---------------------------
Runtime Error!

Program: C:\Program Files (x86)\iTunes\iTunes.exe

This application has requested the Runtime to terminate it in an unusual way.
Please contact the application's support team for more information.

---------------------------
OK
---------------------------

Nome evento problema: APPCRASH
Nome applicazione: iTunes.exe
Versione applicazione: 10.7.0.21
Timestamp applicazione: 504d85d9
Nome modulo con errori: CoreGraphics.dll
Versione modulo con errori: 1.88.0.0
Timestamp modulo con errori: 502da7ba
Codice eccezione: 40000015
Offset eccezione: 0013a712
Versione SO: 6.1.7601.2.1.0.256.48
ID impostazioni locali: 1040
Informazioni aggiuntive 1: b576
Ulteriori informazioni 2: b576d18376d0b50bfaeb8d07c89a9313
Ulteriori informazioni 3: 39b6
Ulteriori informazioni 4: 39b6ab530bdfc3e9827c25611d299a7d

I've already uninstalled iTunes and Apples Software Update, cleaning registry and the reinstalled them, but nothing to do.

Anyone has ideas about?

Thanks to the 3d, bye.