User-Agent: Mozilla/5.0 (Windows; U; Windows NT 5.1; de-DE; rv:1.7) Gecko/20040707 Firefox/0.8 Build Identifier: Mozilla/5.0 (Windows; U; Windows NT 5.1; de-DE; rv:1.7) Gecko/20040707 Firefox/0.8 i have installed a zip version of thunderbird 0.5 and set it as a default mail client. then i installed a german exe version of thunderbird 0.71 and set it as a default mail client, and set thunderbird 0.5 as not default mail client. if i click on any mailto: link thunderbird 0.5 starts Reproducible: Always Steps to Reproduce: 1.click on any mailto: link 2.or click on send ths page 3.

(In reply to comment #0) > i have installed a zip version of thunderbird 0.5 and set it as a default mail > client. > then i installed a german exe version of thunderbird 0.71 and set it as a > default mail client, and set thunderbird 0.5 as not default mail client. Are you setting 0.7 as default using the checkbox in TB's options, or using the WinXP Control Panel? By "set ... 0.5 as not default" -- do you mean that you do something specific in 0.5, or do you meant that 0.5 is made not the default simply by setting 0.7 as the default? That is, do you go into 0.5 and clear the "default mail" checkbox? Before or after setting 0.7 as default? > if i click on any mailto: link thunderbird 0.5 starts From which browser (or other program) are you clicking on the mailto links?

Reporter replied by email (Alex, please put future comments directly in the bug) === > Are you setting 0.7 as default using the checkbox in TB's options, > or using the WinXP Control Panel? Using TB > By "set ... 0.5 as not default" -- do you mean that you do something specific > in 0.5, or do you meant that 0.5 is made not the default simply by setting 0.7 > as the default? That is, do you go into 0.5 and clear the "default mail" > checkbox? yes, i cleared the "default mail" checkbox [Alex, that left unanswered this question: > Before or after setting 0.7 as default? ] > From which browser (or other program) are you clicking on the mailto links? From every browser(IE 6 and Firefox 093)

I have this same issue with 0.9 -- when I unset Thunderbird as the default mail client as either administrator or the account I regularly use (on Windows XP), it doesn't unset Thunderbird as the default mail client, and the checkbox is still checked next time I opened it. OTOH, with thunderbird 0.71 (which I installed over), even though I chose "Yes" to the dialog asking to make it the default mail client and Thunderbird was shown as the default mail client within Tools > Options of Internet Explorer, links clicked in Mozilla opened Outlook Express. Reporter, can you test with 0.9?

> when I unset Thunderbird [0.9] as the default mail client as either > administrator or the account I regularly use (on Windows XP), it doesn't > unset Thunderbird as the default mail client, and the checkbox is still > checked next time I opened it. Brian Bober: Bug 245532 is about the checkbox still being set; are there other symptoms that make you say "doesn't unset as default" -- that is, does TB continue to be used for MAPI or mailto: handling? How are you unsetting the default -- via TB's checkbox, or by setting another program as default? When a version of TB installs itself and makes itself the default, it writes the previous default-client info to a backup space in the registry; when it is *unset* as the default, it copies those values back in. I'm not completely clear on how well different versions are distinguished; if I start a newer version when an older one has declared itself default, it always asks if it should be made the default. (xref bug 266859)

I only modified settings within Thunderbird. > When a version of TB installs itself and makes itself the default, it writes the > previous default-client info to a backup space in the registry; when it is > *unset* as the default, it copies those values back in. This is most likely what's happening. It probably shouldn't back up the registry entry if Thunderbird is already the default browser.

(In reply to comment #4) > I'm not completely clear on how well different versions are distinguished; if I > start a newer version when an older one has declared itself default, it always > asks if it should be made the default. (xref bug 266859) Does this still happen? And if so, what should TB behavior be?