Looking to download the Santa letter. Says invalid pdf.
i suspect that you are receiving this error because you do not yet have enough posts to use the downloads feature. this is only available to Active members.
are you clicking on the green download button on the santa letter download page (and not on the thumbnail pic of the santa letter) i just tried it and it appears to be working fine.
If so and you are still having issues, you may want to try a different browser, perhaps the browser is causing a corruption of the download. I just successfully downloaded the pdf in chrome, firefox and ie this morning after reading your post.