I previously reported that the problem of drafts being created every 5 minutes had been solved by restarting Tbird without Addons but this is no longer the case. I went through the process of adding the English Dictionary for spell checking and removing the preview screen. All was fine for three days but the problem has now returned. If Tbird SW engineers do not issue a upgrade immediately then, with regret, I shall uninstal and move over to another provider. I have been a Tbird user for many years without an issue but I cannot tolerate this any longer. Victorjohn.