I have a strange character showing up on my rss feed. On firefox, it looks like a box with four numbers in each corner, in some cases, 0 – 0 – 9 – 4, in other 0 – 0 – 9 – 2.
These are appearing where smart quotes should be.
I’m familiar with the black diamond with the question mark, but this is a new one.
The 0-0-9-4 indicates that the character was 0x0094, which is an unassigned UTF-16 character. Whatever is producing the feed is inserting characters for which your browser has no font mapping, or possibly the character-encoding specified in the header doesn’t match the stream contents.