Try to edit rancid.

Go to line 1402

Replace:
if (/^(: +)?end$/) {

With:
if (/^End of WAAS configuration/i) {

This should set $found_end =3D 1; when it detects " End of WAAS configurati=
on".

It's a hack that means backup of some other cisco stuff will fail, but try =
to test it. (you can always add it)
I haven't tried it on WAE's, but I did something similar on some Extreme bo=
xes to make it work.

BR
Joachim Jerberg Jensen