LR4 (trial) import hangs during import of files if extension has been changed from uppercase to lowercase on Win7 x64 machine. For example: I imported several files named P1000830.RW2, P1000831.RW2, .... Afterwords the file extension was changed to lowercase outside of LR. When reimporting the files (*.rw2) while the old files (*.RW2) were still in the LR Library, the import hangs.
Bec Sowada • Adobe Employee, May 31, 2012May 31, 2012
This bug has been fixed in the Lightroom 4.1 release, available now. To get Lightroom 4.1, go to the Help menu in Lightroom and select Check for Updates, then follow the prompts. Or, you can download Lightroom 4.1 from adobe.com.