Already posted this in the comments, but I might as well put it here:

When the "Force stack (mod)" action key from the game is set to something other than Ctrl, and CTRL is set as hotkey for this mod, then it's impossible to put down an entire stack.

Maybe this topic is inactive.
But I got a lil' problem[imgur.com].

Mod config:
Drop key: Z
Single modifier: CTRL
Drop mode: On Click

Basically, game crashes in the menu whenever I press 'dat drop key.

Maybe this caused by latest update of this mod. <- most'nd'th truth
Or maybe this cause by smth else.

Edit: no any client mods are turned on expect for your mod tho

Fixed it. Just a simple check. Thanks for the report! Try out the new On Press Drop Mode

am I only have this bug? There is delay when I drop the item
(My setting - drop key : X / drop mode : on click)
It wasn't problem before recent update (I don't know well exactly date)

@Royalucium It seems that I have forgot to recorrect the default value for the On Click drop mode. Thank you for reporting. Have fun with the mod!

Unsure if this was intentional, most likely isn't as I dont see this specific feature being mentioned anywhere.

http://prntscr.com/mc8f85

Pressing the X key at any time swtiches between the 3 modes you have implemented in your mod. It starts on your default preference before entering a game, and reverts back to your default preference if you log out with a different setting.

Config:
Drop Key - Z
Single Modifier - Alt
Drop Mode - On Buttonpress

I used it for debugging. Forgot to remove it. What do you think if I implement it?

Your clients would probably have a use for it, switching between the modes in-game to see which option is most comfortable with them. After that however, I think it would just be left out.

Yeah you're probably right. I'll just leave it out and implement it if there are any requests. Thanks for the report.