Since the latest bobpower update, I can no longer load saves made after the update. I can still load older saves, but when I reload a new save I get a crash. The relevant log portion would appear to be:

172.206 Error ElectricSubNetwork.cpp:1065: Energy source to migrate not found.

List of mods (with log checksums):

25.876 Checksum of base: 4140083139
25.876 Checksum of aai-industry: 2099196449
25.876 Checksum of Bio_Industries: 949974036
25.876 Checksum of bobenemies: 663681064
25.876 Checksum of bobinserters: 1850751968
25.876 Checksum of boblibrary: 4005433163
25.876 Checksum of FNEI: 3244732367
25.876 Checksum of bobtech: 3615039156
25.876 Checksum of bobvehicleequipment: 2739354697
25.876 Checksum of bobplates: 1193779869
25.876 Checksum of angelsrefining: 902797591
25.876 Checksum of bobassembly: 2071865677
25.876 Checksum of bobelectronics: 3969922877
25.876 Checksum of bobgreenhouse: 540722007
25.876 Checksum of boblogistics: 1757794546
25.876 Checksum of bobpower: 2689207123
25.876 Checksum of angelsaddons-warehouses: 438730778
25.876 Checksum of angelspetrochem: 4016052366
25.876 Checksum of bobmodules: 4185527414
25.876 Checksum of bobwarfare: 2220453947
25.876 Checksum of angelssmelting: 2391762017
25.876 Checksum of ShinyBobGFX: 3738260249
25.876 Checksum of angelsbioprocessing: 2326863191

Removing bob's power fixes the issue; loading and saving is then possible, and saved games can be loaded afterwards.

Reactivating bob's power and loading one such save is possible, but saving and reloading crashes the game again.

To clarify, here is the action sequence

1) Load save game A, made with previous version of bob's power -> game loads with the new version
2) Save as game B
3) Load game B -> factorio crashes.

4) Disable bob's power
5) Load game B -> game loads (all items from bob's power are of course lost)
6) Save as game C
7) Load game C -> game loads

8) Reactivate bob's power
9) Load game C -> game loads
10) Save as game D
11) Load game D -> factorio crashes