I taught five to do at least one useful thing: catch and eat spiders. Sometimes I'll see him run in a corner of the room and go after something that I can see. Sometimes, it's a spider.
In this case, we helped him find it so that I could take pictures :)
I was copying a bunch of files to the NAND memory of a thinkgeek gigantor picture frame and after 96 pictures linux was saying "no space left on device" when I had copied 9MB out of 960MB.
I was like WTF? and then a wiff of memory from 20 years ago or so reminded me that the crappy FAT file system has a hardcoded limitation of how many files you can have at the root of the filesystem. Directories can contain more files but the root is limited to some stupid small number.
I guess all those days with PC Tools and Norton Utilities looking at DOS filesystems with an hex editor weren't all wasted afterall :)