re "LR encountered a error when reading from preview cache and needs to quit" - the frequency of this error is increasing. Generally I end up having to delete the preview file to resolve it but it doesn't last long. Is anyone else having this occur frequently and have you figured out what, if anything, can be done to prevent it from occurring. This is starting to get very annoying and disruptive to my workflow. I am running Windows 7 Pro, 64bit, 12 gb of RAM.
Theoretically this should be a very rare occurrence. How much free disk space is there on the disk where the cache is located? How much space have you allocated in preferences for your camera raw cache?