"Sub-Booklet" option only breaks the end of the booklet.

[MarkMLl]

If the sub-booklet section is enabled with a 20pp (which appears the default, at least after installation via Debian) then a 92pp document is broken up into a sub-booklet of 80pp plus another of 12pp.

I presume that the original intention was to allow sections to be printed for separate stitching or stapling, in which case there should be a total of 5 sections generated from 92pp.

Alternatively, if the intention was to allow e.g. 16pp to be placed on a single bifolium which was then folded this should still result in 5 sections.

I've not yet investigated the sourcecode, so don't know whether my meagre skills would allow me to tackle this.