Hummm, I just re-tested and I’m not see this at all. So either (a) it’s something really easy/dumb that I’m missing, or (b) your download is bad (probably my fault) … likely something in the environment that I’m not thinking of/accounting for.
At this point, I think it is unlikely that there’s a plugin conflict. Not saying there isn’t, but I don’t think we need to go there yet.
First, is your debug.log enabled? If not, WordPress debugging (just google it) has simple directions to modify your wp-config.php file and add the environment variables necessary to send all errors, notices, and warnings to the log. It’s not an error, or the site would stop. The notices & warnings may tell me what I need to know. Otherwise, I can send you some instrumented code that will help debug it. [You don’t need to send me a huge file, which you will likely have if you are using a lot of plugins, just delete the file, then load the update games, and send me what’s there.]
Thanks.
-Mark