Interesting ! Please let me know what you find ! On Wed, Jan 25, 2012 at 9:58 AM, Les Hardy <[email protected]> wrote: > Kevin, > David sent me sample images, and I have seen this before. > The image byte count is is the same. The file header is intact, but large chunks of the image data as been changed. > > I have asked David to tell me what operating systems he is using, and what format the external drive is. > > Too soon to say yet, but, the last time I say this, it was an operating system problem, so syncback may be innocent. > > Les Hardy > > > > On 25/01/12 12:08, Kevin Ross wrote: >> Agree, Les.  I do wonder, however, why the previous backups with >> SyncBack did not alter the files ! >> >> Regards, >> Kevin. > > > > :-~:-~:-~:-~:-~:-~:-~:-~:-~:-~: > > Please refrain from posting commercial URLs and from discussing prices on the list. > > Remember to SNIP when replying. > > :-~:-~:-~:-~:-~:-~:-~:-~:-~:-~: > > > > > ------------------------------- > To unsubscribe from the list, please send an email to [email protected] with the word 'unsubscribe' without the quotes in the subject and the body of the message -- -------- K. Ross [email protected]

Ok, we fixed it. When I saw the images, I suspected David may be using Vista, and I thought the corrupt files were caused by Vista itself. What didn't make sense was that the laptop causing the corruption, was actually a Win 7 system. I suggested he turn off the 'Remote Differential Compression'. (This is on by default on Win7). That appears to have fixed it. There is a Vista bug: Copying or viewing of jpeg files (either thumbnail or full size) can render jpeg files corrupt. Files on external hard drives and media cards seem to be more susceptible. I could be wrong, but I don't think Microsoft ever acknowledged or fixed the bug, and now Microsoft no longer support Vista. There were many theories, and plenty tried to find the cause, but I don't think the it was ever isolated. I'm sure someone will leap on me for saying this, but, Win7 is really only a service pack to Vista. I now suspect the bug is still alive in Win7. In my book, any kind of file corruption when copying files is definitely not acceptable. I'm glad I use Linux. Les Hardy On 25/01/12 15:39, Kevin Ross wrote: > Interesting ! Please let me know what you find ! > > > > On Wed, Jan 25, 2012 at 9:58 AM, Les Hardy<[email protected]> wrote: >> > Kevin, >> > David sent me sample images, and I have seen this before. >> > The image byte count is is the same. The file header is intact, but large chunks of the image data as been changed. >> > >> > I have asked David to tell me what operating systems he is using, and what format the external drive is. >> > >> > Too soon to say yet, but, the last time I say this, it was an operating system problem, so syncback may be innocent. >> > >> > Les Hardy