Hi,
It took me some times to understand why some of my triggers didn't work anymore. I used one as countdown only, for altering the color of the main display. (See more info at http://steamcommunity.com/sharedfiles/filedetails/?id=864939640&tscn=1490378620 , thanks to KLG Finski feedback).

In fact, since 1.68, something must be written (returning true or false) in trigger condition. I used to let totally blank (erase this) on trigger condition if I didn't need a condition (delayed script with countdown for example). till 1.66 this field could be empty and the trigger always fired. Now, you must write at least: true to make the trigger work. I admit my bad for a weird usage of the condition field but something has truly changed for triggers and their behaviors. I didn't test all of them.

I hope this could help some other "lazy" scripters as me.