Canon has released firmware v1.0.8 for both the EOS-1D Mark IV and EOS Rebel T2i/550D, correcting a "phenomenon in which the set aperture moves unexpectedly when shooting movies in manual exposure mode using some Canon lenses (such as macro lenses)." The problem affects both models, while the EOS-1D Mark IV firmware additionally fixes spelling mistakes in the French and Spanish menus.
More...
More...