Not for me in a brand new project in FF 15.
Please precise the browser you're using, provide a capx.
Make sure you've noticed this change in r105's log :
Breaking change: certain WebGL effects have been changed to take in to account the scale, so they look similar even at different zoom/window scale levels. However this can cause them to look different in existing projects, because they did not used to take this in to account. The following shaders have been modified: Pulse, Warp, Warp Mask, Warp ripple.
Give as many informations and detailed steps as instructed in how to report bugs.