Yep, I was at the top floor of a 10 floors building. And Ejecteeeed ! Hard fall...
I am happy for not being the only one. ;)

Sure, good thing if it is.

@ Felix : that's right, did not see that.

@ DeadlyDanDaMan : "35 slots bag could take 20 slots when it's empty, 30 when it's 50 % full, and 40 when it's 100 % full. Would be a good thing."
This solution is not so hard and is a good way to have a realistic inventory.

Or 15 when it's empty (3x5), 25 slots when it's 40% (5x5), 35 slots when it's 80 % (7x5) and impossible to stock the bag in an other when it is full.

Or a 35 slots bag could take 20 slots when it's empty, 30 when it's 50 % full, and 40 when it's 100 % full. Would be a good thing.

Because an empty bag can be compressed, but a full bag can not.

@ Epocx : It makes sense, but a full bag takes more space than the space an empty bag can contain. :p

If a full bag would take exactly the space that it has, you could take a full bag, and put it in the same empty bag, and put this one in the same empty bag...
And have infinite bags. ^^

And @ Zombitch : This bug is different, it's not a bag which disappear, but infinite space by combined bags.