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Changes between Initial Version and Version 1 of Ticket #15447, comment 14

initial	v1
6	6	I don't think that's a good idea. There are loops that don't output thumbnails at all, so caching thumbnails whenever a loop start seems wasteful.
7	7
8		Ignore attachment:15447.diff for the time being, I just realized there's a bug with it (using permanent cache and modifying the thumbnail of a post does not properly invalidate the cache).
	8	~~Ignore attachment:15447.diff for the time being, I just realized there's a bug with it (using permanent cache and modifying the thumbnail of a post does not properly invalidate the cache).~~
9	9
10	10	Any suggestion on how to tell if {{{get_post_thumbnail()}}} is being called for the first time in a loop?