Spyder 3.2.8, pip3 and and PyQt5

I recently ran into segfaults on all my computers after upgrading spyder via pip3. Lots of Qt5 error messages. The trouble seems to be PyQt5-5.10.1; spyder 3.2.8 requires at least 5.10.0 (which happens to work). Thus pip3 install --upgrade PyQt5==5.10.0 spyder 
solved my issue.
Note to self: pip3 install PyQt5== is a handy way to list available versions. Sadly, it's deprecated (--use-deprecated=legacy-resolver).
Second note to self: There's also spyder==4.0.0b1 which seems to work with newer PyQts. Good thing I switched to virtual environments.

Moving your thunderbird data to a custom location

Thunderbird's profile data is stored in ~/.thunderbird by default.
If that's inconvenient, i.e. due to disk quota limits, here's is how to move the profile folder. It will have some random name, we'll call it pr0f1le.default, and ~/.thunderbird contains a file profiles.ini and a folder named pr0f1le.default.
Here, I've moved the profile folder to e.g. /media/data/thunderbird/pr0f1le.default and changed profiles.ini to (changes in bold):

[General]
StartWithLastProfile=1

[Profile0]
Name=default
IsRelative=0
Path=/media/data/thunderbird/pr0f1le.default
Default=1

IsRelative has to be 0 because I've given Thunderbird an absolute path to the new location.