Comment 12 for bug 40874

that's what the code is already supposed to do

"2005-05-08 Martin Wehner <email address hidden>

 * libnautilus-private/nautilus-thumbnails.c:
 (thumbnail_thread_start):
 Don't try to thumbnail files which have been modified in the
 last few seconds to avoid constantly re-thumbnailing them.
 Current cool-off period is three seconds. Fixes bug #107418."