Hi. There is a patch for version 1.8.0 in
this thread that should be applied to prevent a possible loop.
If you
download version 1.8.0 after the day of this post, the above patch has already been applied. Otherwise you will need to manually apply the patch.
If you are using a version earlier than 1.8.0, then the patch will need to be applied manually. If unsure, just look for SMALL_WORDS_SIZE in search_function.php and compare the code to the patch.