Well..thats the case since few weeks …. even earlier, when I plugin my iPhone to the PC desktop running Windows Vista (happens on XP too)..on and off iTunes does not connect immediately when iPhone is attached to the system and it keeps recycling the connection by beeping..so, reboot will normally fix that …
But lately iTunes crashes most of the time when I plugin my iPhone and only option is to kill it from the Task manager. Looks like a bug to me in the iTunes.. and I have the latest iTunes along with the latest up2date software on my iPhone as well.
Here is the screen shot of the error from iTunes when it crashed..

http://docs.info.apple.com/article.html?artnum=305841
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Eu estou com esse mesmo problema, como resolvo