pscs autoresolve feature

ok, i know this isn't a photoshop tech forum... but i know there are some major experts in here that can answer or point me in the right direction.

when i copy pics over using the filebrowser i often get the 'an older item named... already exists in this location'... so i click auto-resolve and apply to all...

it seems to do the job just fine... i love that feature and use it all the time before i reformat my card... is there any danger in using it and copying over pics or is it failsafe?

i guess it probably uses the xif data to determine when the pic was taken... any other thoughts on how it works?

not much info provided in the help docs.

Moved to D&G.

Fredi