Running Kubuntu 12.04 LTS, whenever I open the file manager Dolphin, or whenever bring an open Dolphin window into focus after using another program, or whenever I open a filesystem navigation window from within another program (e.g. "Select file to upload" in a web browser, or a "Save File As" window), then my hard drive begins to audibly spin very loudly. This problem does not occur if I browse the filesystem using Konqueror.