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As a rule of thumb, I don't trust anything with PHP Link Directory in the footer. There's a few correlations here: 1. The anchor text used and the ranking lost are very close. 2. The number of links (and anchor text) from one place shot up dramatically in that time frame. 3. The ***linking site's link footprint appears to be pretty terrible as well. If you want, you can try Linkdetox Pro for 149 EU a month. Just take a couple of weekends and really sort it out. (I'm not affiliated with Linkdetox.com)