trisweb:
The filenames are in the order I require with 0.jpg being the first image on day 1 and 230.jpg being the last image 3 weeks later. It's how numeric named files are handled in a particular application that's problematic but not exclusive to ZP.
My only example is using databases. Defined fields are either NUMERIC so that files sort sequentially as 1-10,11-99,100-199 or TEXT where files sort as 1,10,100,101-109,11,110-119,12,120-129 and so on. When viewed in the directory (Finder), they are in sequential order.
Can't remember if the files were named when I scanned them or if Photoshop/Fireworks did them when I used their web album feature. Whatever, every album I have is consistently given numeric file names. In fact, it must have been the apps as long ago, they were named using a date and sequential number combo.
It would take longer to renumber over 200 images in the one album let alone all the others to come

It's only in apps that don't handle the sequential order that's problematic. (And I have no idea of what controls such matters.)