Tunisia, you know what you did.
del.icio.us has a little-exploited JSON API. Besides the lack of documentation, it also has one other catch: It automatically backslash-escapes single quotes and turns the quotation mark into ", possibly among other characters. I can only assume the API assumes you will immediately eval the output and then spit it out onto a web page. Hilariously, del.icio.us converts to character entities again, leading you to actually see " strewn around on that demo as pictured above from my links. Anyway, the point is PHP’s json_decode, being the black box Exception-less and soulless monster it is, will silently fail on trying to parse the mess. The solution? Below.
$s = file_get_contents("http://del.icio.us/feeds/json/hao2lian?raw");
$posts = json_decode(stripslashes($s), true);
Getting rid of the automatic character entitification is left as an exercise to the people of Tunisia, who have had it too good for far too long.