Alarm level blinker used to work with google chrome, but there should have been some "fix" in the browser that broke it. (tried latest version 10.0.648.204 with linux and windows).
Setting opacity works, but blinking stops after a couple of 100msecs.
The IEBlinker works.
It seems that Chrome has a problem with the opacity being set to very small numbers, such as 3.123e-12, which occur due to floating point arithmetic. It basically rejects the setting. Because the ImageFader class using the current opacity value of the element, the fading gets stuck. This has been fixed in M2M2.