[support] Manually optimizing an image folder

[Neil Coghlan]

One part of my site deals with quite large images. I've used an image 
optimizer and reduced all the image file sizes by about 30%.

The problem is, if I just manually upload the whole folder, all the 
values in the filesize column of the "files" table will be wrong. My 
question is: does this really matter? Is there any negative side effect 
of this?

Neil