As someone who has (unfortunately) had to deal with rats before, there is no such thing as a singular rat. A singular rat you see represents many you do not in the vicinity.
By the time you can see a single rat on a simple walk-through of the facility, you have an infestation on your hands.
To address your comment about animals: I saw animals that are littered with disease standing above the product. Standing, breathing without masks, talking without masks(which means trace amounts of spit), in standard clothes that've probably been exposed to much. The rat was far less disturbing than seeing the people who were handling the product.
Contrary to the blood-work, there is a issue that presented itself after 30 days. Not a nutrient deficiency, but a chewing one: he mentioned he started chewing gum due to his jaw aching. As far as I know chewing is supposed to help keep the jaw healthy (an expert/dentist has been sorely lacking from these soylent discussions, I imagine they'd have much to say about chewing, jaw, and tooth issues that crop up), and as someone who hasn't done a great job of that in life... I certainly wouldn't want to mess with jaw health anymore.
Name one competitive weightlifter, powerlifter or bodybuilder that lived primarily on a shake made from powder for years.
EDIT: Specifically I'm thinking of the hundreds (if not thousands by now) of people on T-Nation/Testosterone Nation who've done the 1-month Velocity diet, which is (or was, I haven't been there in years, but that particular diet has been around for at least 5 years+), a protein shake diet with very little solid food. There are years of people doing it for a month and relating their experiences, highlights and downfalls, and I'm sure there are several more experiences in that world that would provide better data points. However, it has the issue of being mostly anecdotal evidence.
* Not trying to advocate Soylent. Just trying to point out that there are a lot of foods in the grocery store that can kill over time (and many are marketed as full meals intended to be eaten regularly).
You know why Soylent is receiving more criticism than pears? Because unlike pear vendors, they are suggesting that you eat their product that way.
The criticism is overheated and silly. Eat what you like, everybody else does. Lets cut out the unsolicited advice and scare tactics, it sounds silly and timid.
Either way, I'm not sure how that argument is supposed to build confidence in Soylent.
This is very disengenous. The makers of Soylent have come out and said Soylent is the only thing you need to eat to have a full and balanced diet.
I can't think of a single other food at a grocery store that has made a similar promise as I dont' believe any food can do this.
Per usual, there's a very informative wiki link: http://en.wikipedia.org/wiki/Scurvy#Symptoms
If the mold was the result of shoddy shipping causing the bag to be punctured, it's hard not to take that with a grain of salt.
And as for the rat (singular -- not "rats" plural as the title says), certainly that has the "eww" factor, but so long as the mix itself was not exposed to any animals, I certainly don't care.
[edit: the article this post was linking to has changed, so my comment is a little dated]