Edited for Syndication: The 80s series got hit with this pretty badly when it was in reruns in DiC's syndication package — the episodes were noticeably sped up and even with that, they were often edited down considerably for time.
Additionally, all logos and references to Southern Star and Hanna-Barbera were deleted and replaced with the "Incredible World of DiC" logo, apparently as an attempt to make it look like DiC made it themselves (Southern Star licensed the rights- H-B/WB no longer has any rights).
Neither adaptation has the complete run on DVD. There were a few releases, but they were randomly scattered five 11-minute segment volumes (two and a half episodes each). The 1985 series did get a few VHS releases, but they were exclusively episodes based on books (such as "The Messy Room" and "The Truth"). The entirety of the 2003 series can be found on YouTube at least.
While it's true that there's been no comprehensive season DVD set release of the 2003 series, as of 2016 there have been so many individual and compilation DVD releases of the series, mostly by Kaboom, that it seems very unlikely that there are any installments of the series that aren't on DVD. In particular, this cube set includes close to 50 stories from the show across 10 DVDs (there are one or two story duplications) and is probably the closest thing to a complete series set the show will have.
Recursive Adaptation: Some episodes of the TV series were eventually turned into books themselves - twice. Some were rewritten as Berenstain Bear Scouts chapter books, which of course led to some Adaptation Expansion.
Society Marches On: The story about Sister being bullied by Tuffy. Sister only gets away with a slap on the wrist - in the new tens, Sister would have been in just as much trouble as Tuffy.
Additionally, Tuffy is seen throwing rocks at a baby bird - that would easily put Tuffy in therapy today.