Recently I noticed a drop in traffic from Google to my site www.HintsAndTips.com and also noticed that it dropped from a PR5 to a PR4. Browsing the logs I find that there was a major drop in traffic from Google to the tune of about 75% which started right around the first of the October.

Digging in the logs showed that key words that were providing traffic previously, no longer bring traffic from Google. One example was the combination: "flush dns". They drop from 57 visits last month (and about that many each month since the tip about it was posted) to zero traffic from Google on on those keywords. Browsing many of Google's result pages based on on those keywords, I could not find my site referrenced.

No changes have been made to the site that I can think of which could have caused problems (at least during the last month).

Is this just typical and I should expect this often or is this something new?