Resizable textarea box moving off the right side

It seems to only affect resizeable form textareas.

It occurs in both standard Zen and Zen-fixed.

Edit /modules/system/system.css and remove the following lines

System.css at line 340:

.resizable-textarea {
  width: 95%;
}

Thanks to fajerstarter and his Horizontal "grippie" for the resizable textarea suggestion.

I haven't seen this in the latest 5.x-1.x-dev. Please re-open if you are still experiencing this problem. Thanks!