.slideToggle() on .contents() throws error

[[email protected]…]

Version: jQuery 1.9.1

Browser: Chrome 26.0.1410.63

OS: Mac OS 10.7.5

Demo: ​http://jsfiddle.net/nzyM8/

What I tried to do: I tried to slide toggle the contents of a fieldset using slideToggle() on .contents().

Step-by-step instruction:

1. Open the demo
2. Click on the legend in the fieldset

What I expected: The contents of the fieldset would slide toggle

What actually happened: I received the following error: "Uncaught TypeError: Cannot set property 'cur' of undefined " at line 3888.

[dmethvin]

Did you mean this? ​http://jsfiddle.net/nzyM8/1/

Using .contents() there is really strange.

[anonymous]

Hmm, indeed that's the effect I wanted to create. Better use siblings then...