Fixed in 0.18.10, thanks!

If the resulting blueprint is too wide, it will zoom incorrectly, overflow the window and get cropped.

best description is by replication: (pardon my terminology) 1) navigate somewhere in map, zoom out to last detailed level (before going schematic) 2) hold any building by hand (medium pole in example) 3) mouse over any (other) building (lab in example) 4) zoom out one more level, keeping cursor on t...

When I browsed my blueprint book, hovering mouse over bueprints, an autosave triggered. After it finished, the view of the blueprint was moved to top left corner. When I hovered over the next blueprint, it was placed correctly, the same for the original on the second try. No crash, only a glitch. Sa...

I placed one train by blueprint (1:2), then tried to put a locomotive at the end (opposite direction) by using the same (rotated) blueprint, crash. The wagons were overlapping, there was enough room on the straight rail. Noteworthy, previous attempt was successful. EDIT: tried to repeat the scenario...

Why the Item Groups / Subgroups? I hope they come back

Just had the same problem as posted originally, daniel34´s suggestion helped me.
Deleting only the Config folder did the job. Any idea how this suddenly happened or how to prevent it?

When you run Factorio when another instance is already running, it shows an ugly message.

Not really a critical thing, might be done better (e.g. "Factorio is already running", or switch to the other window).
Also, probably not version specific.