Pre-Press

Bleed
One of the most requested features for Scribus was automatical bleed (Well, at least Scribus will show the bleed area and export it to PDF. You still have to move your objects into the bleedarea yourself). As of version 1.3.4, it's possible to set the bleed for the document. Demanding users will be happy that it can be set for each margin individually. Bleed settings are offered in four different dialogs:

Additionally you can already create the bleed for your pages when you create a new document:

Overprinting
Overprinting is an important technique in professional printing to prevent mismatches with overlapping colours in offset printing. As of version 1.3.4, Scribus now can activate overprinting for individual items in the Properties Palette:

These settings can be overridden in the PDF Export Dialog and general overprinting will be enforced:

Preflight Verifier
The Preflight Verifier has seen some useful enhancements. First, it now also checks for a permitted maximum resolution of images. Second, it will check for GIF files, if desired. GIFs don't belong in pre-press, so that's helpful. Third, the tool will ignore non-printable layers. That's useful if a Scribus file consists of layers, which aren't supported by all PDF formats. Letting Scribus ignore those layers will prevent false alarms from the preflight check.