Mods can move a post, with replies and votes, to another community. The change federates to other instances (except Lemmy, for now. I've been in discussion with devs from NodeBB and Lemmy about how this will work, they are on board).
Upload video files while creating a video post - no external host needed. Admin setting to limit who can do this (to save space).
Realtime chat - conversation immediately updates on screen when a new PM arrives.

More good stuff

Author-deleted posts are still visible to them and anyone with the url. No more loss of high-value comments with the OP deletes.
Search filters - nsfw and minimum post score
Improve speed of cross-posting form on mobile
Emoji tokens like :blush: can be used in post or comment body. No GUI support yet.
Admin setting to disable local copies of remote images - good for single-user instances
Replying to a comment marks associated inbox item as read
Updated HPT-Fruits theme
196 no longer excluded from default community import
Remove unused community rating feature
Remove unused instance vote weight feature
Remove ineffective þ to 'th' replacement
Improved accessibility - better contrast, fixed many incorrectly-used aria-labels
Updated translations - Basque, Chinese, Japanese

API:

Admins can ban/unban users through the API. piefed.world was maintaining custom code for this, hopefully it'll make their version upgrades faster.

Bugs fixed

PMs
Markdown parsing
Speed up loading of profile pages for admin users
Friendica post parsing
Passkeys login UX tweak

To upgrade

To upgrade from 1.4.x:

git pull  
git checkout v1.5.x  
./deploy.sh or ./deploy-docker.sh

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[–] victorz@lemmy.world 4 points 1 week ago (2 children)

What was this "þ to 'th' replacement" movement supposed to accomplish? Prevent LLM-feeding scraping from producing anything useful?

And what does the change log entry mean practically? People who type þ will have their input changed to "th" before posting?

[–] SatyrSack@quokk.au 7 points 1 week ago* (last edited 1 week ago) (1 children)

And what does the change log entry mean practically? People who type th will have their input changed to “th” before posting?

It means that it used to be replaced when viewing a comment with a thorn on PieFed. The comment still contains a thorn in the database. With the update, it is no longer replaced.

For example, here is this post from a PieFed instance that is still on v1.4.0, which just shows th everywhere. On the other hand, here is this post from a PieFed instance running the v1.5.0 update, showing the thorn.

[–] victorz@lemmy.world 4 points 1 week ago (2 children)

Okay cool, thanks. So then that begs the question, in what way was this replacement ineffective?

[–] onlinepersona@programming.dev 10 points 1 week ago (1 children)

There must be an Icelandic community that complained about suddenly seeing English letters in their text https://codeberg.org/rimu/pyfedi/issues/1559

[–] victorz@lemmy.world 2 points 1 week ago

That makes sense!

[–] wjs018@piefed.social 6 points 1 week ago (1 children)

The user in question just switched to a different unicode character that looks pretty much identical to the thorn symbol. AFAIK, we didn't actually get any complaints from Icelanders, but we weren't happy with the implementation due to its potential impact on that community. At the end of the day, we decided that this is a user problem where bans and blocks should be used instead of putting something explicitly in the code.

[–] _Nico198X_@europe.pub 2 points 1 week ago

what problem?

[–] inlandempire@jlai.lu 2 points 1 week ago (1 children)

Icelandic þ is pronounced like th as in thorn, so I guess it was just for ease of reading, but maybe there weren't any Icelandic on piefed so they removed the automatic change

[–] cabbage@piefed.social 9 points 1 week ago (1 children)

If I'm not mistaken thorn (the character) was historically used in England as well, but was replaced with "th" to make things easier for Gutenberg and his followers.

Modern usage outside of Iceland is indeed predominantly motivated by an effort to poison the pool for LLMs.

[–] mbirth@lemmy.ml 6 points 1 week ago

poison the pool for LLMs

This is the correct answer. Some people wanted to try making the þ show up in future LLM answers.