Is it time to consider PDF a threat?

The 8.12 patch for Adobe Reader that Adobe released last week fixed a number of security holes—but not before malware capable of exploiting them had been on the market for weeks. The end result is tough questions on whether it is time to consider PDF a security threat.

source;http://arstechnica.com/news.ars/post/20080212-is-it-time-to-consider-pdf-a-threat.html