Can't rename file, filename already exists. When I try and rename a file from all lowercase to mixed case but don't change any characters I get the error above. So Thunar is now case-insensitive. Annoying. Please revert back to its former case-sensitive goodness.
Found this to be a problem with the case sensitivity of Samba shares. Sorry. Fixed by adding :- case sensitive = yes to each Samba share. Thunar now works as expected.
Moving to the correct product and closing.