I know the full release isn't far away now, but I had enabled loading/saving in the open beta, and now my save game with lots of hours played put into it is refusing to load. It just freezes on the loading screen with the progress bar approximately 2/3rds of the way along. The log file reads like this:
Can I edit anything to restore my save game? I had some cool lines and healthy profits coming in! 
Code:
Opened log in "userdata/log_metro.txt".
initializing FMOD...
[done]
initializing OpenGL-window...
[done]
Loaded language "en_US"
Engine initialization finished
Loading ui...
[done]
Loading achievements...
[done]
Loading main menu...
[done]
Start scenario "userdata/saves/vienna1 1935/level.scenario"
Loading game...
Error: Runtime error in "userdata/saves/vienna1 1935/gamedata.script" at line 38: Stack size exceeded!
Error: Runtime error in "metro/ui/petitionbar/petitionbar.script" at line 974: Variant is not a map!
Error: Called from "metro/ui/petitionbar/petitionbar.script" at line 1077
Error: Runtime error in "metro/ui/hqpanel/policy.script" at line 186: Variant not indexable!
Error: Called from "metro/ui/hqpanel/policy.script" at line 342
Error: Runtime error in "metro/scripts/player.script" at line 266: Variant not indexable!
Error: Called from "metro/ui/hqpanel/budget.script" at line 126
Error: Called from "metro/ui/hqpanel/budget.script" at line 95
Error: Called from "metro/ui/hqpanel/hqpanel.script" at line 362
Error: Called from "metro/ui/hqpanel/hqpanel.script" at line 372
Error: Runtime error in "metro/scripts/economy.script" at line 75: Variant not indexable!
Error: Called from "metro/scripts/game.script" at line 83