Google Cache Anomaly?

[nickied]

Been lurking here a while, great board, my first post.

Background. My primary business is not i.s. related. I do run a small (very small) site for my business. I'm not a seo expert, don't spend a lot of time tweaking site, struggle with my php/sql db, etc. I do validate to w3.org and check my site in google almost daily.

I suspect due to the pummeling googlebot did last month, my cached pages more than doubled as of this morning.

Here's the odd part.

Looking at a few of my newly cached pages I find this:

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This is G o o g l e's cache of [my domain] as retrieved
on Dec 31, 1969 23:59:59 GMT.
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I know 1969 isn't right (Gore hadn't invented anything yet) and I dynamically datestamp all pages and have dates on these pages stamped in late September. What am I missing something here, are others seeing similar results?

Thanks.