Adobe Lightroom 3 consistently does not rename my photos correctly. When you use the Library Module>F2-Rename Dialog, the images do not rename according to my personal preset specifications. One example is my personal default preset: Name, Location_yyyymmdd_nnn.ext (Snowfall, Jonesborough TN_20101216_001.dng). After executing the rename, my images rename Snowfall, Jonesborough TN_20101216_001-1.dng, and Snowfall, Jonesborough TN_20101216_002-1.dng etc. for as many photos as are listed. Sometimes it will skip a photo and rename it correctly, then start up again with incorrect renames. I check the folder in Windows Explorer to quickly determine the actual name of the image. There are no duplicate images present for LR to implement its -1 rename. The only workaround that I have found is to F2+Enter at least 2x before checking in Windows Explorer to verify the rename. Please report this as a bug.