r2q function returning a non unitary qutarnion when passed a Eigen::Isometry3d::linear() object

Function located in include/core/math/rotations.h

The following code

Eigen::Vector4d cqt = R2q(T.linear()).coeffs();
Eigen::Matrix3d R = T.linear();
Eigen::Vector4d cqt2 = R2q(R).coeffs();
std::cout << "cqt: " <<  cqt.transpose() << std::endl;
std::cout << "cqt2: " <<  cqt2.transpose() << std::endl;
std::cout << "cqt.norm(): " <<  cqt.norm() << std::endl;
std::cout << "cqt2.norm(): " <<  cqt2.norm() << std::endl; 

where T is an Eigen::Isometry3d.

It returns the following results

cqt: 0.0058 0.35   -0.35  0.71  
cqt2: -0.013   -0.0082  -0.00011 1       
cqt.norm(): 0.86
cqt2.norm(): 1

Have you experienced this strange behavior? The 2 versions were working before.