Thanks for the info, Les ! Regards, Kevin. On Thu, Jan 26, 2012 at 2:04 PM, Les Hardy <[email protected]> wrote: > > 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 > > > > :-~:-~:-~:-~:-~:-~:-~:-~:-~:-~: > > 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]