I converted my raw images to dng format from Lr2. Some of the files are being identified as missing from the grid view or filmstrip, and they all have the CR2 file extension. I had selected the option to delete the raw file after a successful conversion so I was expecting to see the image with the dng extension from within Lr.
When I right click these missing files and open the source directory it brings up a list of close matches. I see the same filename with the dng extension and am able to select this file and restore the image back to Lr.
The good news is that nothing seems to be lost. The bad news is that I need to manually bring each missing image back into Lr. Fortunately my library has only 6,000 images and it seems like only 5-10% are affected.
Could there be user error behind this problem? Possibly. During the conversion process a second operation began in the background. I saw a right pointing arrow (just a single arrow) next to both these operations. Being curious (or stupid) and not seeing this in Lr1 I clicked. The second operation went away.
Did I screw up or is this a bug?