Fine as long as you use classloader isolation.
thx for the reply Pete.
This seems to be an advantage of having the seam and RF jar's in the WAR/EAR rather than the server/default/lib folder.
Also, I'm not sure what version of JBoss AS the following link is referring to. Is your comment above true for JBoss 4.2.x? thx.
All versions of JBoss on which Seam runs.