Photoshop will detect a double-click in the layers and channels panels even when there are different modifier keys held down on the first click vs. the second click.

I have never intended to double-click and accidentally changed the modifiers I was holding down between clicks.  I often perform an action requiring modifier keys and immediately follow it with an action that requires no modifiers (or different modifiers).

I realize that the conventions for what constitutes a double-click are platform dependent and not particularly well documented, but I do expect Photoshop to work the way that my operating system does (Mac OS X 10.6.8)).  I know older versions of Windows detected double-clicks even when modifiers were changed between clicks, but I believe the latest versions behave similarly to OS X.

Examples:

Start by having a document open with multiple alpha channels and layers in it.

Select an alpha channel by clicking on it's thumbnail in the channels panel.

Quickly hold down the control key and click again.

Result: this brings up the "Channel Options" window. (as if you had double-clicked)

Expected result: should bring up the channel's contextual menu.

Bonus extra nitpick:  The window opened on mouse-down, not on mouse-up.

Create a non-blank alpha channel.

Hold down the command key and click on that alpha channel's thumbnail. (loads the channel into the selection)

Quickly release the command key and press the mouse button.

Result: Brings up the "Channel Options" window. (as if you had double-clicked)

Expected result: Start a drag operation on the channel.

Click on a layer in the layers panel to select it.

Move the mouse pointer to a different layer.

Hold down the shift key and click to select multiple layers.

Quickly release the shift key and press the mouse button.

Result: Brings up the "Layer Style" window.  (as if you had double-clicked)

Expected result: Begin a drag operation.

Bonus extra nitpick:  The window opened on mouse-down, not on mouse-up.

Interestingly the layers panel does the correct thing when control is pressed between clicks, but the channels panel does not.

The options windows opening on mouse-down instead of mouse-up has never bothered me, but I believe it goes against convention.

Thanks.