Update file size mismatch error code U43M1D204

Question

I had Creative Suite 6 Master Collection installed yesterday, about seven updates notification appeared, they were done successfully except for Photoshop Camera Raw and Media Encoder
I tried the workaround in this thread, i deleted AAM update folder, but no use
http://forums.adobe.com/message/3864845#3864845
i went to log file aamu.log and found the error messages:
2012-08-17T16:20:29: connecting to: = http://swupdl.adobe.com/updates/oobe/aam20/mac/AdobeMediaEncoderCS6-6/6.0.1/Setup.dmg
2012-08-17T16:20:30: ThreadDownloadUpdates:: Need to download a .sig file for this dmg at: /Users/bahaelaila7/Library/Application Support/Adobe/AAMUpdater/1.0/Install/AdobeMediaEncoderCS6-6/6.0.1/Setup.sig
2012-08-17T16:20:30: ThreadDownloadUpdates:: downloading .sig file from : http://swupdl.adobe.com/updates/oobe/aam20/mac/AdobeMediaEncoderCS6-6/6.0.1/Setup.sig
2012-08-17T16:20:31: ThreadDownloadUpdates: ERROR: File Size Mismatch, between what is given in manifest and what is that of bob.
2012-08-17T16:20:31: UCGetprogress : WARNING - Download failed due to file size mismatch at server.
2012-08-17T16:20:31: UCGetprogress : Updates download returning state for reffId  = AdobeMediaEncoderCS6-6/6.0.1
2012-08-17T16:20:31: UCGetprogress : Updates download returning state     = 43
2012-08-17T16:20:31: UCGetprogress : Updates download returning outError  = 204
2012-08-17T16:20:31: UCGetprogress : Updates download returning percent   = 0
2012-08-17T16:20:31: UCGetprogress : Updates download returning unique error code string   = U43M1D204
2012-08-17T16:20:31: UCGetprogress : Updates download reporting headlight data for error code. = 204
2012-08-17T16:20:31: Check for Updates was done successfully.
2012-08-17T16:20:31: UCGetprogress : Check for updates returning state for reffId  = AdobeMediaEncoderCS6-6/6.0.1
2012-08-17T16:20:31: UCGetprogress : Check for updates returning state     = 21
2012-08-17T16:20:31: UCGetprogress : Check for updates returning outError  = 0
2012-08-17T16:20:31: UCGetprogress : Check for updates returning percent   = 100
2012-08-17T16:20:31: UCGetprogress : Check for updates returning unique error code string   = U21M1C0
2012-08-17T16:20:31: UCGetprogress : WARNING - Download failed due to file size mismatch at server.
2012-08-17T16:20:31: UCGetprogress : Updates download returning state for reffId  = AdobeMediaEncoderCS6-6/6.0.1
2012-08-17T16:20:31: UCGetprogress : Updates download returning state     = 43
2012-08-17T16:20:31: UCGetprogress : Updates download returning outError  = 204
2012-08-17T16:20:31: UCGetprogress : Updates download returning percent   = 0
2012-08-17T16:20:31: UCGetprogress : Updates download returning unique error code string   = U43M1D204
2012-08-17T16:20:31: UCDownloadUpdates : (A) UCIsSelfUpdateAvailable API returned value = 0
2012-08-17T16:20:33: Returning from << UCDownloadUpdates >> call with outErr value = 0
2012-08-17T16:20:33: ThreadDownloadUpdates: Downloading installer for update refID: PhotoshopCameraRaw7-7.0/7.1.71
2012-08-17T16:23:34: connecting to: = http://swupdl.adobe.com/updates/oobe/aam20/mac/PhotoshopCameraRaw7-7.0/7.1.71/Setup.dmg
2012-08-17T16:23:35: ThreadDownloadUpdates:: Need to download a .sig file for this dmg at: /Users/bahaelaila7/Library/Application Support/Adobe/AAMUpdater/1.0/Install/PhotoshopCameraRaw7-7.0/7.1.71/Setup.sig
2012-08-17T16:23:35: ThreadDownloadUpdates:: downloading .sig file from : http://swupdl.adobe.com/updates/oobe/aam20/mac/PhotoshopCameraRaw7-7.0/7.1.71/Setup.sig
2012-08-17T16:23:36: ThreadDownloadUpdates: ERROR: File Size Mismatch, between what is given in manifest and what is that of bob.
2012-08-17T16:23:36: UCGetprogress : WARNING - Download failed due to file size mismatch at server.
2012-08-17T16:23:36: UCGetprogress : Updates download returning state for reffId  = PhotoshopCameraRaw7-7.0/7.1.71
2012-08-17T16:23:36: UCGetprogress : Updates download returning state     = 43
2012-08-17T16:23:36: UCGetprogress : Updates download returning outError  = 204
2012-08-17T16:23:36: UCGetprogress : Updates download returning percent   = 0
2012-08-17T16:23:36: UCGetprogress : Updates download returning unique error code string   = U43M1D204
2012-08-17T16:23:36: UCGetprogress : Updates download reporting headlight data for error code. = 204
2012-08-17T16:23:36: UCIsSelfUpdateAvailable : Function returned with value =>  = 0
2012-08-17T16:23:36: UCIsSelfUpdateAvailable : Is BOB downloaded =>  = 0

Answer 1

I don't think it is related to firewall/security, because other updates for flash, dreamweaver and others updated successfully.
I had the same issue with one of Dreamweaver CS5.5 updates, it wouldn't update no matter how many times i redownload (using Adobe Updater).
one aspect is that, it takes its time downloading updates, but fails upon applying them, so links (accessing web) is not an issue here.
Also, looking at the error message, it says file size mismatch, and it appeard just ONE second after trying to download sig files
it's possible that, either sig file size mismatches what's written in webfeed file (or whatever "manifest" file as referred to in log),
or
dmg file size as written in sig file does not match the one dowloaded. as sig (signature) files are small, around 5k each. (could have been downloaded in less than one second).
I don't know why I haven't seen anyone else complaining from the same problem, though seemingly sig files are the same for same dmgs.
Or, I could have been the first to complain, and what I did worked for them too, hopefully