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unable to set message list column headers

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(ref: https://support.mozilla.org/en-US/kb/message-list-columns) Is anyone else seeing this ... I am trying to use "apply colums to folder and its childern" but it simply does not work (maybe a bit random). I know it used to work but something recently reset a lot of my feeds to default columns and I need to get them back to the (uniform) setting I use for them all. Doing them all manually without the assistance of "apply colums ..." is not something I want to do! thanks. (latest Thunderbird on Windows 7 / 64)

(ref: https://support.mozilla.org/en-US/kb/message-list-columns) Is anyone else seeing this ... I am trying to use "apply colums to folder and its childern" but it simply does not work (maybe a bit random). I know it used to work but something recently reset a lot of my feeds to default columns and I need to get them back to the (uniform) setting I use for them all. Doing them all manually without the assistance of "apply colums ..." is not something I want to do! thanks. (latest Thunderbird on Windows 7 / 64)

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As a test; I added a column header 'Size' to my Inbox folder. click on icon and selected : 'Apply columns to' > 'folder and it's children' > 'mail account name' > 'mail account name'. (I did not select an individual folder - just the mail account name) I then refreshed all folders by collapsing and reopening or selecting folder to refresh it. All folders in that account were changed to exactly what was selected in the inbox.

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Thanks. hmmm ... after a bit more googling I decided to delete localstore.rdf (see http://kb.mozillazine.org/Profile_folder_-_Thunderbird) and that seems to have solved the problem although I had to got a reset all my mail and feed columns again, but luckily only once by using "apply columns .." whcih now works. I guess Thunderbird got confused :-) Seems to happen often enough.