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Cannot write in a new message window or reply window

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When I try to write a new email the window appears but the cursor does not blink either in the address box or message box. The same happens when I try to reply to an email.

When I try to write a new email the window appears but the cursor does not blink either in the address box or message box. The same happens when I try to reply to an email.

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Select Help/Restart with Add-ons Disabled (safe mode); any difference?

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Thanks for getting back to me with this suggestion. When I do as you suggest and open TB in safe mode with add-ons disabled the issue is resolved. However, when I log out and log back in again as normal, the problem of not being able to write in the new email or reply window returns and I have to go through the safe mode process again. Is there any way I can disable add-ons - as that seems to be the issue - on a permanent basis?

由 macdonaldmedia 於 修改

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If the problem is due to add-ons, open Tools/Add-ons/Extensions and disable the add-ons, if any, one at a time, and restart. Keep doing this until you find the add-on that is causing the problem. Also, use the default theme if not already doing so.

If an add-on or theme isn't a factor, the next possibility is a broken layout. Launch in safe mode, check 'Reset toolbars and controls', then click 'Make changes and restart'.

Report back if none of these methods work.

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Thanks very much for your help. Your suggestion worked after I disabled shockwave flash plug-in. For info, I didn't have any extensions and was using the default theme, so I suspect the shockwave flash was the culprit.