Mail "unexpectedly quits" -- connection to iCloud migration?

Question

I'm stumped. I upgraded to 10.5 iTunes recently and since then, my mail, iCal, and address book are all on the fritz. Mail is a constant bomb... 3 seconds up and crash. iCal and AddressBook are a bit more stabile.
Running 10.6.8, MacBookPro 2010. Reinstalled to 10.6 from original disks, reinstalled all apps. Mail keeps crashing. Items I've searched for and have not located: mail preferences and a Library "bundle". In other threads these were recommended to be disposed of -- I would if they were there.
Wondering if this Apple pushing my "sync" to the iCloud service? I've turned off syncing in system prefs.
Anyone else seeing this issue with mail? Any solutions?
Thanks much.
[ Sidebar -- I'm not a fan of iCloud, I think it's going to be a huge mistake. I've used Mobile Me for years...I don't need iCloud and I will truly miss the iDisk feature. ]

Answer 1

Launch the Console application in any of the following ways:
☞ Enter the first few letters of its name into a Spotlight search. Select it in the results (it should be at the top.)
☞ In the Finder, select Go ▹ Utilities from the menu bar, or press the key combination shift-command-U. The application is in the folder that opens.
☞ Open LaunchPad. Click Utilities, then Console in the icon grid.
Step 1
Make sure the title of the Console window is All Messages. If it isn't, select All Messages from the SYSTEM LOG QUERIES menu on the left.
Enter the name of the crashed application or process in the Filter text field. Post the messages from the time of the last crash, if any — the text, please, not a screenshot. 
When posting a log extract, be selective. In most cases, a few dozen lines are more than enough.
Please do not indiscriminately dump thousands of lines from the log into a message.
Important: Some private information, such as your name, may appear in the log. Edit it out by search-and-replace in a text editor before posting.
Step 2
Still in the Console window, look under User Diagnostic Reports for crash reports related to the process. The report name starts with the name of the crashed process, and ends with ".crash". Select the most recent report and post the entire contents — again, the text, not a screenshot. In the interest of privacy, I suggest that, before posting, you edit out the “Anonymous UUID,” a long string of letters, numbers, and dashes in the header of the report, if it’s present (it may not be.) Please don’t post shutdownStall, spin, or hang logs — they're very long and not helpful.