Following up to my own report, I figured out the problem. Somehow, I had two older versions of the libwiretap libraries lying around in my /usr/local/lib directory:
lrwxrwxrwx. 1 root root 19 Sep 12 09:54 libwiretap.so -> libwiretap.so.0.0.0
lrwxrwxrwx. 1 root root 19 Sep 12 09:54 libwiretap.so.0 -> libwiretap.so.0.0.3
-rwxr-xr-x. 1 root root 1492111 Sep 12 09:54 libwiretap.so.0.0.0
-rwxr-xr-x. 1 root root 482721 Mar 27 06:13 libwiretap.so.0.0.2
-rwxr-xr-x. 1 root root 1428963 Apr 19 04:43 libwiretap.so.0.0.3
I deleted the two older versions and redid the logical link to point to the so.0.0.0 file and now all is well. What I don't know is how those other two got there, or why the logical link was not set to point to the correct file. I'm writing this up here so that if anyone else has this problem in the future, the problem might get solved a little faster.
Ed