It is a long story but when my brother gave me this D70, we went out for a day to practice and take shots, he was giving me a tutorial. We got back and went to put the images up on his PC... I think via the usb cable to camera. It was unplugged as they did not show up or something, to try the cf reader... Basically the card was corrupted I think... it wouldn't work in the camera... He reformatted it reluctantly.... in camera.. It still didn't work.. I think at this point the shutter wouldn't go when pressing the trigger, though maybe it wasn't in focus and it was on auto maybe.. I was shooting on full manual.. but when it didn't work he may have switched to auto ... will auto even shoot in manual focus mode? I know now I can only take the shot if the camera determines it is in focus... in auto. Anyway... we tried another CF card... same still.. and a CHA error... one of these cards happened to have been formatted in his new D300 (i think it is)... this isn't good either... anyway... so i went home to solve this wad of errors with research.. and some i.t. knowledge. So i formatted via xp, wiped free-space of the cards and formatted in camera a few times... I think it worked for a bit... but anyway... when it did work.. it was fine for a while. Slowly I would have a random card error... anyway... basically I get into the habit of switching off, reinserting the card firmly, switching on... and with the same technique it always comes good out of cha or 'for' and I can keep shooting. But anyway so to finally test this properly I bought a extreme3 8gb, it is fast and nice... but it happened to get a card error right when the battery died... when i put the new battery in... all 1400 images from my overseas trip i was currently on were vanished... they were present in that the number of shots left ghosted them.. but not viewable. After I got home I found them put in an offset folder... which was easy to get them off. http://download.cnet.com/PC-Inspector-Smart-Recovery/3000-2242_4-10066144.html Has been priceless to me and it is literally priceless... best recovery program for digital photography. Sometimes images vanish... but i can grab them off... even though i didn't delete them.. convar will pick them up. (they did this only once, usually they are there or one out of many is corrupt). Anyway sometimes one image will have a 'faulty' header, and with jpgs this kills the image... all data must be present for a jpg.. though oddly I do get half images... and mixed up corrupted files... But nothing like the next time I used the 8gb... ... it crapped out on a trip when I got back around local heritage area... and all photos were fine... but some... were just a mess... there were folders with jibberish files and tags... and false files sizes.. the folders in the jpg name of the image that were corrupt. Anyway... so all was well after that... cha would occur sometimes... but I can cope... but again my 8gb has done the vanishing trick... I havn't looked but it looks like they will be in a folder offset like last time... SO people have written online CHA may be linked to temperature... colder times making it happen more... also that the battery terminals may need a clean insinuating the card error is a power fluctuation or flaw... and other linking on from this idea have sent their camera to Nikon where-by the shutter mechanism was replaced and the CHA card error ceased. So the shutter may have been frictive and drained power or something. Has anyone had any experience solving their Nikon card errors and how? CHA is a 'miscellaneous card error'. For is a need to be formatted... and more recently I ad dashes for an error... would Nikon be so kind to help me out do you think? Also my 18-55vr developed a hideous blur that is nauseating away from the middle of the shot... close up macro style is fine as it isn't so obvious but anything landscape is so ... so noticeable the centre can be super-sharp but it just loses focus out form the centre even on a flat plane. This I think is from the air pressure flying to Kuala Lumpur or Kuching, or the humidity. It was a bummer... I usually compose my shot so an object is in focus then set it off to the side so it is nicely framed... like a statue in the distance then set off from a temple in the centre. meaning... the centre is unfocused... but the statue has this hideous vignetted blur, effectively making the whole shot ruined. Someone said it looks like a crooked glass element... the VR having 11 this is probably a simple thing to occur over such an array. But I need to find this warranty card :< Anyway... let me know your thoughts or if I can help with your problems... unfortunately I have a heap of experience troubleshooting on this now.