I have checked to see that all my drivers and the Windows Visual C++ library etc. are up to date. Running current windows/x86 platform. Running current Thunderbird. Sometimes it forces a Thunderbird restart; sometimes it lets Thunderbird run but I then can't get messages saved to my sent folder, and sometimes it has no effect (seemingly) and I just have to close the error window. Can you tell me what function it is that T-bird is prompting the 6025 reference??