I haven't worked out the threshold yet but when listing files in directories over a certain size with lsr --long --time I always end up with one file being shown with the incorrect user and group of root with the wrong size and date. Same result omitting --time.
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-rw-r--r-- moderation moderation 5.1 KB 31 May 2008 icon.jpg
-rw-rw-r-- moderation moderation 646.9 KB 22 Oct 2007 opera.adr
---------- root root 0 B 31 Dec 1969 inf70.pdf