[Nick_1964]

@davidfor Sorry for replying a message that is not intended for me.
At 3.16.10 I had 3 spontaneous reboots. (before I downgraded) on one device ( Glo HD) that is the one I used the most and I could not reproduced it.
Only thing I can say it was all on kepub.
On that reader I have about 15 books.
I tried it on the second reader to open the exact same book and started 5 pages before the other one rebooted, I could safely read and nothing happened.
I opened another kepub,and wham,reboot.
Opened the same kepub on the 1st device.. nothing happened.
Score, device 1: 3 reboots, device 2: 1 reboot.

This morning I upgraded from 3.16.10 to 3.17 without patching at all (wanted to see how the linespacing was unpatched) and was reading a normal midsised kepub (created with Calibre,all sideloaded) and wanted to play a bit with the linespace bar.
Reboot.
After the reboot I opened the same book again and played with the linespacebar again to see if I could reproduce it.
Nothing happens.
Didn't tried it at the second device.
Applied the disable patch, upgraded the second and also applied the sickel disable patch.

With both devices I was not able to reproduce the reboot a second time.
Did noticed something weird when applying the disable sickel patch one one device: it looks like the screen was a bit in a black and white circle when disabled from the usb that moved a bit to the right like a clock moving counterclockwise before it rebooted to process the disable sickel patch.
Did applied the patch to the second and was watching if the same happens to the second one.. it doesn't..
The size of the KoboReader.sqlite is 1.629.184 bytes.. a bit more then 1,5 mb.. that doesn't seem to large to me..