Essentially, there's been an outbreak of a form of fungus that grows on corneas - apparently, an increasing problem. The direct cause isn't known yet, but there appears to be an 85% correlation between the problem and the use of ReNu contact lens solution. Bausch&Lomb have suspended shipping the product pending an investigation.
The fungus can cause temporary blindness, and if it gets too serious, permanent corneal scarring.
All of which comes down to: If you're using ReNu, you might want to consider trying another brand, at least until more results come out.