jquery切换效果重置元素宽度

For some reason when i use the jquery toggle function with a speed option, the element width is animated at the same time (from 50% of the width to its full extent). I don't recall noticing it in previous version of jquery. Is there a way to make sure the toggle doesn't touch the width? The problem is that i have some floated content in the element, so when toggled , the floated layout is broken until the animation is completed. Any ideas on how to fix this?For some reason when i use the jquery toggle fu