Comment 0 for bug 386326

User-Agent: Mozilla/4.0 (compatible; MSIE 7.0; Windows NT 6.0; SLCC1; .NET CLR 2.0.50727; .NET CLR 3.0.04506; InfoPath.2; FDM)
Build Identifier: TB Version 2.0.0.5 (20070716) - Lightning 0.5

Configuration:

4 imap based mail accounts with SSL connection to the mailserver and two webdav based ics calendar files (around 500KB) with https connection to CMS server (Internet with dsl 16M/1M connection).

Problem:

Reproducable timing bug in Lightning leads to endless CPU usage of 50% (Dual Core), if a calendar action (PUT/GET) is started at the same time like mail transfer. No more calendar actions useable until killing TB process.

Reproducible: Always

Steps to Reproduce:
1. Insert an event to the webdav calendar with an invitation via email
2. If the mail window is closed to early (to send the invitation), the thunderbird process gets 50% cpu until killing the process. No calendar actions are useable until reopening thunderbird after killing process.
3. Deactivating all security features of mail transfer (no SSL IMAP/SMTP), the problem does not occur.
Actual Results:
Same results with TB portable and Lightning 0.5. add-on. Sunbird does not have the problem, because of separate threads and missing email invitation functionality. Sometimes the webdav based calendar file is corrupt after this bug.