I have been trying to get my pdf/x-1a document past the Wargame Vault/DriveThruRPG/Lightning Source premedia stage for a while.
Completed contents files would not upload to WV, it wasn't that they were rejected, the upload just hung. Since then tests revealed that contents versions without vector files uploaded OK but versions with vector files sent direct to LS were rejected possibly due to a flattening issue, they said.
Is this something which can occur with vector graphics? I have three layers for the background masterpages, image boxes and text boxes (the vector files are in the image layer for text to flow around).
The vector graphics were created by printing to a .ps file with a virtual postscript printer, renamed to .prn files and imported as vector files. They display fine when viewing the finished pdf.