Microsoft's "second Tuesday of the month" patch cycle is in tatters with the release of Microsoft Security Bulletin MS04-025 on the 30th of July. The patch addresses the critical vulnerability exploited by JS.Scob.Trojan (alias Download.Ject) that was discovered in June. It is recommended that the patch is installed as soon as possible.
System Administrators can rest assured that Microsoft will continue to adhere to their update schedule, except when they don't.