User Agent: Mozilla/5.0 (Windows NT 6.1; rv:17.0) Gecko/20100101 Firefox/17.0 Build ID: 20130328110703 Steps to reproduce: Write an e-mail ... Actual results: Sometimes Thunderbird changes images if I write an e-mail. I answer a friend, and sometimes, if I click on "save" or if TB save the e-mail automatically, an image from an older mail (that I've send a few weeks ago) appears. I always have to watch out before I send an e-mail (I click on "save" and check the e-mail), so that other friends or family members doesn't receive naked men or whatever ... It's a bug since TB 17. Before version 17 TB never did that. I hope my English was good enough to understand what I mean and to find the errror. Otherwise I have to install 10.0.12 again. I write daily, and the error appears one or two times a month. Thank you.

Here you can see the bug.

Same problem as bug 766495, bug 799450, or bug 817245? Those bug are mainly report for "Edit Draft and other draft mail in Drafts folder" case, but same thing occurs on "Forward/Reply of mail in local mail folder and other mail in the local mail folder". What is shown as "Image location:" of Image Property of the image in composing window? What kind of data is held in mail ponted by the "Image location:"? Why do you experience problem like bug 766495, bug 799450, or bug 817245 so frequently? Those bug occurs when Compact happens on the local mail folder where original mail is held if Forward or Reply istead of "Edit Draft". Do you use POP3 and keep all mails in Inbox even though Inbox is a kind of ”letter box", "mail drop", "mail tray", "post box", which is not for "repository of mails to keep mail data for long time"? > It's a bug since TB 17. Before version 17 TB never did that. What is file size of your Inbox? (Inbox, not Inbox.msf) If larger than 2GB, Compact silently failed before Tb 17. In Tb 17, the problem of Compact was resolved, so Compact normally works from Tb 17 as far ar file size after Compact is less than 4GB.

Yes, It could be bug 766495 ... I use POP3. I've never used IMAP. The Inbox file has 286 MB, Drafts file 323 MB, Send file 354 MB, Trash file 119 MB. The list for drafts in TB GUI is empty. I've only mails in my inbox and outbox. The photo with the blue and yellow letterbox in front of the wall (Screenshot I've uploadet yesterday) Thunderbird inserts already three or four times. It looks like TB inserts only a few images again and again. Mostly the letterbox image I think (I've found the original e-mail today in my inbox and outbox, it's 8 weeks old). And I have found another example with a wrong image. I load it up too, so you can see it. In this second example TB inserts a photo of a hand-held blender while I'm writing an e-mail. I'm not sure what you mean with "image location". If I click on "Antworten"/Reply, and double click on the right image in composer window (the error message of Windows), Thunderbird shows me this address: -- "mailbox:///D:/TEMP/.../Mail/pop.gmx.de/Sent?number=371669823&header=quotebody&part=1.2.2&filename=bjdccajj.png" HTML source code is: <img src="cid:part1.09040700.07090000@gmx.de" alt="" width="941" height="419" border="2"> If I doublecklick on the wrong image (the two letterboxes in front of the wall) in the other mail, Thunderbird shows me this address: -- "mailbox:///D:/TEMP/.../Mail/pop.gmx.de/Sent?number=371718986&header=quotebody&part=1.2.2" HTML source code is: <img src="cid:part1.06090703.01090408@gmx.de" alt="" width="941" height="419" border="2"> Sorry, I haven't no more time at the moment. But I think it's like bug 766495. I've not read the complete text there. I have to repair my bike and must go shopping. Thank you and good luck.

Duping to bug 766495. Because phenomenon of bug 799450 and bug 817245 can occur, watch three bugs, and if duping is wrong, re-open, please.