I see in the arch repo icu was updated tonight and Provides: libicudata.so=70-64, libicui18n.so=70-64, libicuio.so=70-64, libicutest.so=70-64, libicutu.so=70-64, libicuuc.so=70-64
So I guess thunderbird-appmenu from the AUR needs a rebuild.
I don't know if the (nightly?) rebuild in the chaotic AUR fix it...
It only rebuilds automatically if the maintainer increases pkgrel, which didn't happen in this case though. I still rebuilt it (+bumped pkgrel), does it help?
Awesome, looks like it is upgrading without the error now. I wasn't for sure where the issue lied. If it was the maintainer, I was going to fill out a report, but... @dr460nf1r3 done ...did...his magic. Thanks guys!