Opera patched in secret

An anonymous reader writes: Opera 9.10 released in December seemed to be a rather cosmetic update. But as heise Security reports, behind the scenes Opera patched two remote code execution holes — neither of them mentioned in the changelog. In addition Opera rates an exploitable heap overflow as "moderate" because it is "not trivial to exploit it reliably". I wonder if this is really done to protect thier users or rather to minimize public exposure...