Thanks, Jade. That worked, and I will upload the patch to subsite-procs.tcl.
As for the cause - I'm wondering if it isn't a platform issue. I recently installed 5.1.3 on Debian Linux and did not encounter this error. More recently, I installed 5.1.4 on Suse Linux Enterprise 9 and got the error. At a glance, the code looks the same in both versions and I'm using the same version of TCL (8.4) on each box.
I'm really not sure what it could be that accounts for the apparent difference in code interpretation, if that is in fact the problem. But maybe this info will help someone down the road.
