I am using CFEclipse 1.3.2beta with Eclipse SDK version 3.3.2 with Aptana. The tag insight (tag completion) feature was not working. After a little research I found that if you right click on the project and select Add/Remove CFE Nature, tag insight will start working again.
Now if only it would add automatic slashes at the end of self-closing tags and give me standard tag property option insight life would be great. I miss you Dreamweaver!