The following are supported: * Nuke 4.0 - 5.1 running on Mac OS Intel 10.4-10.6 (32-bit), Windows XP, Vista, or 7 (32/64-bit) as applicable, Linux (32/64-bit) as applicable.

If you want a widget to appear in the default position again (for example, in the center of the frame), you need to move it there manually.

This is due to the fact that these plug-ins do not support tiles. The workaround is to give Nuke full access to memory and/or to avoid having several other applications running at the same time.