I've been using this plugin to test out the upcoming 3.6 branch of WordPress so I've set it up to stay on the bleeding edge nightlies. However, after I update WordPress, if I go back to the Updates page, it will say that there is yet another upgrade available to WordPress. Even after I install it, the version numbers stay the same e.g. 3.6-beta3-24375 upgrade and I see 3.6-beta3-24375.
If I wait a day or few days, the numbers do change but it seems like there is always an update for WordPress even if there really isn't one. I've caught myself performing 2,3 upgrades just because the prompt tells me a new version is available.