Not sure if this is new to v10 or not. In my test database I have four records each with two images. If I export to CSV, only for the first two records do the links to the exported image folder appear. For the other two records nothing is placed in that column at all. The out.files folder only contains images for the first two records. Even though all records have two images.
Another bug, if you export a multi-line text field that contains a carriage return it messes the export up. That part after the carriage return becomes separated from the rest of the export in a new row.
Hmmm ... it has now corrupted the database I was working on and it is lost, won't open.