One piece of evidence cited by FDA was the imagery used in the ad. Looking back over previous posts I have made, I find a post I made back in January, 2008, about an Avodart PRINT ad, which, as it turns out, ALSO exaggerates the amount of prostate gland shrinkage attributed to Avodart. See the following images:

The top image shows the whole ad, while the bottom image shows an enlarged area of the ad plus an optical illusion I added (see a previous post for an explanation).Note that the enlarged illustration suggests that Avodart shrinks the prostate whereas "Other Drugs" do not (the ad copy says so outright -- click the ad image to enlarge IT). The image also shows a shrinkage of 19% in the diameter of the prostate, whereas the FDA says clinical trials only show a decrease of 10%.
Seems that the FDA missed this ad. Why don't they read this blog? It would save them a lot of time!