User-Agent: Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.9a8pre) Gecko/2007082317 Mnenhy/0.7.5.20003 SeaMonkey/2.0a1pre Build Identifier: Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.9a8pre) Gecko/2007082317 SeaMonkey/2.0a1pre Using the twisty at the Subject:-field at the headerpane to collapse and reopening it again makes the twisty in front of the To:-field disappearing. Reproducible: Always Steps to Reproduce: 1. You need a message with many email recipients in the To: so there is a twisty present in front of the To: at the headerpane. 2. Switch to collapsed view by clicking the twisty in front of the Subject:-field at the headerpane. 3. Switch to the detailed view again by clicking the twisty in front of the Subject:-field again. Actual Results: The twisty in front of the To:-field is gone. Expected Results: The twisty in front of the To:-field should be still present as it was. If the headerpane is already collapsed at the startup, the twisty at the To:-field will be shown the first time when reopening the headerpane. Collapsing and reopening again will kill the twisty. I tested without mnenhy (!) with: -- Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.9a8pre) Gecko/2007082317 SeaMonkey/2.0a1pre (self compiled from cvs) -> Twisty killed -- 2007082405_thunderbird-2.0.0.7pre.en-US.linux-i686 (official trunk nightly) -> Twisty killed -- 2007082403_thunderbird-3.0a1pre.en-US.linux-i686 (official trunk nightly) -> Twisty killed -- TB version 1.5.0.12 (20060911) (official SUSE version) -> Twisty *not* killed I enabled Mnenhy in the official SUSE TB version 1.5.0.12 (20060911) from above and the twisty *gets* killed. I guess all this has something to do with Bug 62033 which brought the feature of references links to the headerpane. Mnenhy also does this.

(In reply to comment #0) > I tested without mnenhy (!) with: > -- Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.9a8pre) Gecko/2007082317 > SeaMonkey/2.0a1pre (self compiled from cvs) -> Twisty killed > -- 2007082405_thunderbird-2.0.0.7pre.en-US.linux-i686 (official trunk nightly) > -> Twisty killed Sorry, typo here ^^^ Twisty gets *not* killed on 2007082405_thunderbird-2.0.0.7pre.en-US.linux-i686 (official trunk nightly) > -- 2007082403_thunderbird-3.0a1pre.en-US.linux-i686 (official trunk nightly) -> > Twisty killed > -- TB version 1.5.0.12 (20060911) (official SUSE version) -> Twisty *not* > killed > > I enabled Mnenhy in the official SUSE TB version 1.5.0.12 (20060911) from above > and the twisty *gets* killed. > > I guess all this has something to do with Bug 62033 which brought the feature > of references links to the headerpane. Mnenhy also does this. >

This regressed between linux seamonkey build 2006-12-19-08-trunk and 2006-12-20-08-trunk (so older than 62033)

It seems bug 363933 is what broke this

What's happening now is that somehow that when the entire pane is collapsed the To: field is treated has overflowing horizontally. When you then uncollapsed it bug 363933 then causes a horizontal underflow event to get dispatched, at which point the old code erroneously hides the twisty. Note that event.detail could be 2 to indicate both horizontal and vertical underflow, which might apply in the case when the entire pane is uncollapsed when the To: field isn't overflowing.

Comment on attachment 278209 [details] [diff] [review] Ignore horizontal overflow you rock Neil.

Fix checked in. (In reply to comment #6) >(From update of attachment 278209 [details] [diff] [review]) >you rock Neil. Only because ajschult determined the check in that that exposed the bug.