<p>
using .stop(*, false) , .stop(*) , or just .stop() , when midway during an animation it might break:<br>
the 'maximum position' is no longer reached after a few clicks.<br>
this effect is visible in jQuery < v1.7 (e.g. select framework jquery version 1.6.4 just left of this text)<br>
</p>
$('#target')
.stop(<select id="selectstopoption"></select>)
<input id="b" type="button" value=".slideToggle()">
<div class="container fixheight">
<div id="target" class="inner">
some content<br>
fsd sdfklfd lgjdfgdkg dlgk dfl lfdgldf dfgl kdf kljdfgdlfg ldfg ldflk fgl dlkfgdlfgfdlkg dfglk d lkdfg
dlkf lfdlgl dkfg klfdlkgdfglk klfgdlkg ldfglk ddlfg<br>
sdflksdf sdlfdsf dsk fsdf klsf lksdflk sddflkslfs sskdl flksdf jl<br>
fsd sdfklfd lgjdfgdkg dlgk dfl lfdgldf dfgl kdf kljdfgdlfg ldfg ldflk fgl dlkfgdlfgfdlkg dfglk d lkdfg
dlkf lfdlgl dkfg klfdlkgdfglk klfgdlkg ldfglk ddlfg<br>
sdflksdf sdlfdsf dsk fsdf klsf lksdflk sddflkslfs sskdl flksdf jl<br>
</div>
</div>
<div>
see <a href="https://api.jquery.com/stop/" target="_blank">$.stop( [clearQueue ] [, jumpToEnd ] )</a>
"Toggling Animations":<br>
<quote>
As of jQuery 1.7, stopping a toggled animation prematurely with .stop() will trigger jQuery's internal effects tracking. In previous versions, calling the .stop() method before a toggled animation was completed would cause the animation to lose track of its state (if jumpToEnd was false). Any subsequent animations would start at a new "half-way" state, sometimes resulting in the element disappearing. ...
</quote>
</div>