TypeError when using Eigen{vector, system, values}

[BudRz]

For this matrix problem

In[1]:= A := {{1,-2},{2,1}};

when I do either

In[2]:= Eigenvalues[A]

or

In[2]:= Eigensystem[A]

or

In[2]:= Eigenvectors[A]

I get the error:

TypeError: Invalid comparison of complex -1 + 2*I

Matrices that had real eigenvalues had no such issue.

Is there a workaround for this problem?

[GarkGarcia]

This has been fixed.