Well, since changing the script to use file.ext instead of the original filename, I haven't had any problem resuming from fileservers that don't like the "" string.
Although there must be a reason why Kaled supposedly changed it in 6.11 & 6.12 to use the original filename - I assume there must be some other clients I haven't come across yet that won't work without a valid matching filename. So it's probably safest to stick with that.
