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Thunderbird mail window reading window flickering

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Hello there. I have a problem when i try to read my mails in thunderbird. When i click on a mail and it opens in the window, the text begin to flicker and bounce, and i cant read the mail.

Please help.

Hello there. I have a problem when i try to read my mails in thunderbird. When i click on a mail and it opens in the window, the text begin to flicker and bounce, and i cant read the mail. Please help.

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Does it happen in safe/troubleshoot mode, (hold Shift when launching TB)? Is hardware acceleration enabled in Settings/General, when in normal mode?