warning suppress

I have a strange warning message that pops up when I submit nodes with images. I'm fairly certain it's a bug with Filefield. I thought it was this one http://drupal.org/node/311526, but they claim it's been fixed. Regardless, it's simply a warning, and doesn't break things.

Question: How can I suppress this message programatically? I know, I know. This is a HORRIBLE thing to do, but I'm busy and I need it to disappear now as opposed to me spending days tracking down the error. Is there some sort of preprocess function that I can use to delete a warning message? Thanks.