When uploading media wp_unique_filename() treats capitalisation as being different.

[husobj]

On most web servers "Photo.jpg" and "photo.jpg" can be treated as different files.

The problem is when backing up a local copy (to my Mac) it will not let both these files exist at the same time - it wants to replace one with the other as it treats lowercase and uppercase as the same.

I suggest that we should do the same with uploads so that if "Photo.jpg" exisits and you upload "photo.jpg" is is renamed to a unique name.

I guess this would require a fix in the wp_unique_filename() function.