WARNING: Global themes and widgets created by 3rd party developers for Plasma can and will run arbitrary code. You are encouraged to exercise extreme caution when using these products.
A user has had a bad experience installing a global theme on Plasma and lost personal data.
https://www.reddit.com/r/kde/comments/1bixmbx/do_not_install_global_themes_some_wipe_out_all/
Global themes change the look of Plasma, but also the behavior. To do this they run code, and this code can be faulty, as in the case mentioned above. The same goes for widgets and plasmoids.
We are calling on the community to help us locate and quarantine defective software by using the "Report" buttons available on each item in the KDE Store.
Please see the attached image to locate them.
Meanwhile, KDE is taking measures to properly warn users before each download and we are also putting in place ways of auditing and curating what is uploaded to the KDE store.
https://blog.davidedmundson.co.uk/blog/kde-store-content/
Nevertheless, this will take time and resources. We recommend all users to be careful when installing and running software not provided directly by KDE or your distros.
And remember to report any faulty products you find!
@kde Thanks for providing a means for users to forward feedback.
I use Debian, BTW (if I may be so bold as to co-opt an Arch meme ) so I'm still going to be on 5.27 for a while now. I'm reluctant to report issues as I expect (and prefer) that the KDE devs focus on 6.
I suppose if I saw a serious issue I'd report, but for the occasional paper cut I just move on. Most of those would be hard to reproduce anyway and without that a report would just waste dev's time.
I'd ask first on a forum.