In ArcGIS 10, I note that if you use ArcCatalog to preview a shapefile, a lock file is written into the folder where the shapefile exists.
The problem is, that if you now try to copy the folder using Windows Explorer, an error pops up "Error copying file or folder" - Cannot copy <filename>: it is being used by another person or program. Close any programs that might be using the file and try again.
This is going to cause us major issues with shapefiles on network drives where multiple people are viewing and copying.
Has anyone else seen this ?