While checking recent fossil ability to serve repos from subdirectory as implemented in [d04fa1e1438ec7] I encountered problem with serving repository with old db schema (repository test.fossil with config.aux-schema="2006-12-23" in my case served locally on win XP).

Steps to replicate:

1. copy old fossil repository into some subdirectory of directory, where fossil repos are served ("_qqq" in my case) 

2.attempt to see it on http://localhost:8080/_qqq/test/timeline show following error:
<h1>Server Configuration Error</h1>
<p>The database schema on the server is out-of-date.  Please ask
the administrator to run <b>fossil rebuild</b>.</p>

3. rebuilding repo fails with test.fossil-journal file left in place:
<pre>
c:\soft\bin\_qqq>fossil rebu -R .\test.fossil
C:\soft\bin\fossil.exe: out of memory
C:\soft\bin\fossil.exe: SQLITE_BUSY: statement aborts at 2: [ROLLBACK] cannot rollback transaction - SQL statements in progress
<pre/>

Serving repositories from "_qqq" subdir with uptodate db schema (config.aux-schema="2011-02-25 14:52") works fine.
e.g.:
http://localhost:8080/_qqq/myfossilclone/timeline

Now, I am unable to rebuild my old repo with newest fossil executable even in its original location.

problem serving fossil repos with old db schema from subdirectory