I am experiencing problems using 64 bit Win 7 and LR4. it seems to crash every time I try to "DEVELOP" a dng format image that was created with LR3. Has anyone else experienced this. I am not having the problem with CR2 or JPG images
All my images are DNG (Adobe) and yes I too crash most of the time when switching to the DEVELOP module, especially so is previews are still generating from the import process. It is no longer every time, but is still crashes on my desktop and when it does, it is always when switching to the DEVELOP module.
Also, my laptop (single core, but still running LR3 with not problems) can't even start LR4b without crashing. I uninstalled it on that system.
I just noticed a posting on the LR4 site: http://forums.adobe.com/thread/951501... that seems to indicate it is a problem for files imported that already have PV2010 applied. Certainly this describes my files. As suggested in that posting, I will try some fresh files from my camera instead. You should try the same William and report back.