new TCL vs. current-6

Three of my TCL-based ports fail now on amd64 running current-6. All failures 
occur, when an attempt is made to use the TCL-interpreter -- either to run 
the port's self-tests, or to generate the manual pages. The failures are 
either "Floating point exceptions" or "Segmentation faults" and appear to 
only happen on amd64 (may be, on ia64 as well):

http://people.freebsd.org/~fenner/errorlogs/mi%40aldan.algebra.com.html

Can anyone confirm being able to use freshly built TCL on amd64 _at all_?

My ports did not change in months -- what could be wrong with TCL and/or 
amd64?

Thanks!

	-mi