All apple software updates are corrupt

Question

for some reason any updates I receive for my macbook pro through software update, itunes (for ipad, iphone), and even when I manually download them from the website (like 1.6.4 combo) are corrupt.
itunes + ipad with the new 3.2.2 update gives me error 14 with a link to this page http://support.apple.com/kb/TS1275. Not helpful in this case.
As far as OSX updates 10.6.4 would constantly corrupt. As does successive other updates like the recent camera raw update and xcode update. I would blame the OS install and reformat except for some reason when I tried these updates at a friends house they work... really strange. I have also resorted to torrenting the update in the case of the 10.6.4 combo. I would really like this fixed but I am at a loss for what to do, and google hasnt turned up people in similar situations for me.
Could shaw (my Internet provider), my router, or... anything be screwing this up somehow?

Answer 1

heres a relevant log, at least I think it is. Its the one generated by trying to update xcode to 3.2.3.
first the one for the software download:
10-08-07 5:33:21 PM Software Update[205] SWU: scan found 1 products:
zzzz061-8720
com.apple.message.uuid: 11E54BBF-F7D6-48D5-A93A-B8B6CE3B9903
com.apple.message.domain: com.apple.SoftwareUpdate.time.scan
com.apple.message.signature: SUCCESS: http://swscan.apple.com/
com.apple.message.result: success
com.apple.message.value: 75.43260
com.apple.message.value2: 2392.263
com.apple.message.signature2: Software Update
com.apple.message.signature3: SUScanResultCode, 0
then the corresponding error:
10-08-07 5:26:53 PM Software Update[594] PKG: extracting "com.apple.pkg.Xcode3.2.3Update"
Error Domain=PKInstallErrorDomain Code=110 UserInfo=0x11425fb60 "An error occurred while extracting files from the package “Xcode3.2.3Update.pkg”." Underlying Error=(Error Domain=NSCocoaErrorDomain Code=259 "The file couldn’t be opened because it isn’t in the correct format.") {
NSFilePath = "/var/folders/zz/zzzivhrRnAmviuee+++++++++/Cleanup At Startup/PKInstallSandbox-tmp/Root/Developer";
NSLocalizedDescription = "An error occurred while extracting files from the package \U201cXcode3.2.3Update.pkg\U201d.";
NSURL = "Xcode3.2.3Update.pkg -- file://localhost/Library/Updates/zzzz061-8720/061-8720.English.dist";
NSUnderlyingError = "Error Domain=NSCocoaErrorDomain Code=259 \"The file couldn\U2019t be opened because it isn\U2019t in the correct format.\"";
PKInstallPackageIdentifier = "com.apple.pkg.Xcode3.2.3Update";
com.apple.message.uuid: 466F8978-BD69-44EE-9229-90048E3FF2BF
com.apple.message.domain: com.apple.PackageKit.install.package.extract
com.apple.message.signature: FAILURE: com.apple.pkg.Xcode3.2.3Update
com.apple.message.result: failure
com.apple.message.value: 1.38748
com.apple.message.signature2: 1.0.1.1248867338
I dont see any entries for the ipad update failure in the console.
"That is very strange.
Did you have any of these devices connected to your MBP?
Had you used Torrents before this episode?"
currently my ipad, its stuck at the restore screen atm as the corropted 3.2.2 failed to load