IE<=9 blur.placeholder

[redcom]

Placeholder attribute becomes the value of the element when triggering "blur.placeholder"

<input type="text" name="name" placeholder="e.g. John Doe" onkeyup='firePlaceholderKeyup()'>

function firePlaceholderKeyup() {
    $(this).trigger('blur.placeholder');
}

This is the case for IE<-9 where the placeholder value ends up in the value attribute of the element. The text from the palceholder remains in the attribute value if the class is removed and all the action performed with the value attribute contain the text from placeholder.

Possible solution is:
to add the following code to the else branch of setPlaceholder method, just before the

$input.remove(className);

$input[0].value = ($input[0].value !== $input.attr('placeholder'))? $input[0].value: '';

[jli3238]

The following fix works:

Add:

|| input.value == $input.attr('placeholder')

So setPlaceholder() looks like this:

function setPlaceholder() {
var $replacement,
input = this,
$input = $(input),
$origInput = $input,
id = this.id;
if (input.value == '' || input.value == $input.attr('placeholder')) {

[mrhmouse]

I can confirm this issue. Here is a test page demonstrating how calling blur on an element after calling placeholder will cause the placeholder value to become the input's value.

[mathiasbynens]

Why are you calling blur on it?

[mrhmouse]

I'm calling blur to remove focus from the input. The plugin functions correctly (in my experience) when a user blurs an input manually via the Tab key or by clicking elsewhere. It also appears to function correctly when focusing another input via focus (as shown here).

[FrittenKeeZ]

I can confirm that the fix jli3238 posted works.
I call blur on an input field when enter is pressed to perform a search, but in IE8 it will display the placeholder text as the input value.

[PepeuCps]

I can confirm that the fix jli3238 posted works too.