Comment 2 for bug 638000

I removed the attachment, since it contains personal information. However this section could be the culprit:

72bf8c89-c342-4d6c-9007-23012368f8b5/WPJ: Sending: <?xml version="1.0" encoding="utf-8"?>
<soap:Envelope xmlns:soap="http://schemas.xmlsoap.org/soap/envelope/" xmlns:t="http://schemas.microsoft.com/exchange/services/2006/types" xmlns:m="http://schemas.microsoft.com/exchange/services/2006/messages">
  <soap:Header>
    <t:RequestServerVersion Version="Exchange2007_SP1"/>
  </soap:Header>
  <soap:Body>
    <m:FindItem Traversal="Shallow">
      <m:ItemShape>
        <t:BaseShape>IdOnly</t:BaseShape>
        <t:AdditionalProperties>
          <t:FieldURI FieldURI="calendar:UID"/>
          <t:FieldURI FieldURI="calendar:CalendarItemType"/>
        </t:AdditionalProperties>
      </m:ItemShape>
      <m:ParentFolderIds>
        <t:DistinguishedFolderId Id="calendar"/>
      </m:ParentFolderIds>
    </m:FindItem>
  </soap:Body>
</soap:Envelope>

This is a query for all calendar items, but without date restriction. That means it pulls out all calendar items ever. This leads to high load on the XML parser of mozilla.

Do you have some settings that differ between windows and linux?