Google partially indexes pages all the time, it really is nothing to worry about, less so with dynamic pages, as it is so common in my experience. FYI a partially indexed page just shows up as a url, or sometimes just a page title, but normally without a page description, this shows that the page has been indexed, but the content of the page has not, (hope I have explained that well enough).
So is THAT what we call those little suckers: 'Partially indexed pages'.
I'm seeing a lot more of those thingys in Google's SERPs since the Keep the Faith When the [url=http://searchengineland.com/070621-145956.php]Keep the Faith When the Algo Changes[/url], especially with dynamic sites, so this 2-step approach seems to be here to stay. (Of course, maybe it was around a lot last year too and I just didn't notice it!)
Perhaps we should christen it the 'semi-sandbox approach'!?