Stephan Minning announces that his AE filter Normality will not support After Effects CS5. It looks like his other filters may also reach end-of-life with CS5.
For background see A plug-in developer's thoughts on AE CS5 64-bit.
Update: the comments on Minning's latest post were lively, but there wasn't a cogent explanation on why "a simple software bridge" was too difficult. Perhaps support would cause too many problems.