Cyberion posted a note saying that an unused archive in yesterday's Pure DOS package was infected with some sort of malicious code. The file in question was not actually used in the execution of his program, but to be safe, he has reuploaded a cleaned version. You may want to run a local virus scan if you used this program, but even if you did, it's unlikely that anything got out. You can find Cyberion's full post here. I recommend Free AVG.