Removing default.xml from share/keys will probably break all keyboard shortcuts. The file was intact, though, when you started to have this issue, I assume.
Yup, it did break, but only configurable shortcuts. Hard-coded keys still work (or could possibly work, in my case). And yup, the file was untouched until that day.
What is your operating system language? Do you use any special keyboard apps?
Windows 7 SP1, Russian. Keyboard layouts are English (US) and Russian. English is the default one.
There is an app related to my keyboard, and AutoHotkey. I tried to switch them off, also removing them from Startup and reboot the system — didn't help.
Also, I just got an idea and tried On-Screen Keyboard. You guessed it, it didn't work either.
Did you uninstall, then reinstall, for your updates?
You mean Inkscape? I prefer using portable version, but I've tested the installer recently.
Installed, with erasing previous preferences; uninstalled, without keeping user data; reinstalled again. No changes.
As for system updates, I'm not desperate enough to undertake such drastic measures.
I wrote a small script to click on corresponding buttons on the toolbar to make corners smooth/cusp, it's easing my suffering for now.
I'm starting to believe that my PC was assembled on a big-endian burial ground.