I haven't seen this last problem, no, but I'm not sure if I've tried any pages with our own tags defined. I've been doing all my OpenACS 4.6 and dotLRN 1.0 development on AOLserver 4.0 beta2, though - and so has Jeff, I believe.
And I haven't seen the site map problem, though perhaps I didn't understand the bug report and just haven't visited it in a way that triggers the problem.
The biggest issue has nothing to do with OpenACS - the fact that code that's not threadsafe has snuck into the implementation of the "file" command, leading to seemingly random crashes or (even worse) memory corruption that can cause files to be written to seemingly random directories etc etc.
What's the status of this problem?
It's a TCL 8.4.x problem, not AOLserver problem, but since AOLserver 4.0 requires Tcl 8.4.x it means one can't use AOLserver 4.0 in a production system.
