Logging truncates the file at noon

Hi,

I've searched Google and the Eyebrowse for this and can't find anything
relevant (EyeBrowse seems to have a lot of issues -- about half the links
I click on just lead to a stacktrace).  I'm not sure if this is an issue
with log4net or my configuration.  Any pointers are much appreciated.

Problem: my log files are rolled daily, but every day at noon the existing
data is blanked out of the log (the file is truncated).  The effect is
that when I look at yesterday's file, I only see information for yesterday
after noon, not before noon.  I have actually watched this happen; the
first statement that writes to the file after noon truncates everything
already in the file.

My version: 1.2.0.30714.  I'm on Windows, MS.NET Framework v1.1.4322 using
Visual Studio 2003 and linking to the pre-built DLL from SourceForge.

Sample of my App.config file:

<?xml version="1.0" encoding="utf-8" ?>
<configuration>
    <configSections>
        <section name="log4net"
type="log4net.Config.Log4NetConfigurationSectionHandler, log4net" />
    </configSections>
    <log4net>
        <appender name="FileAppender"
type="log4net.Appender.RollingFileAppender">
            <file value="//server/share$/log/log-" />
            <appendToFile value="true" />
            <datePattern value="yyyy-MM-dd.\\tx\\t" />
            <rollingStyle value="Date" />
            <staticLogFileName value="false" />
            <layout type="log4net.Layout.PatternLayout">
                <conversionPattern value="%-5p %-20t %d %c line %L%n
%m%n" />
            </layout>
        </appender>
        <root>
            <level value="INFO" />
            <appender-ref ref="FileAppender" />
        </root>
    </log4net>