Mozilla/5.0 (X11; Linux i686 on x86_64; rv:26.0) Gecko/20100101 Firefox/26.0
SeaMonkey/2.23a1 ID:20130809003001 c-c:c185ea1e04c1 m-c:e33c2011643e

QF 3.12pre55, listed as enabled in add-ons manager

extensions.checkCompatibility.nightly is "user set" to false in about:config

No QF toolbar: neither the main 3-pane window nor its Preview Pane have their
usual QuickFolders toolbar. The Message Read window (which I rarely use) hasn't
got one either.

The problem didn't exist with SeaMonkey 2.22a1 (whose last build for Linux was
dated 26 July).

accepted.  shouldn't be a big deal to fix -likely a change in the xul which
needs to be mirrored with a new version specific a new version specific
specific overlay.

is current folder toolbar'still visible? 

Any errors in route console? 

Can somebody provide a download link for 2.23? I have looked at

http://ftp.mozilla.org/pub/mozilla.org/seamonkey/nightly/

but wasn't too sure what to pick o_O

(In reply to comment #2)
> Can somebody provide a download link for 2.23? I have looked at
> 
> http://ftp.mozilla.org/pub/mozilla.org/seamonkey/nightly/
> 
> but wasn't too sure what to pick o_O
> 

For 2.23a1, from the nightly directory above, descend either into
latest-comm-central-trunk (for en-US) or into latest-comm-central-trunk-l10n
(for localized builds) then download and install one of the following,
depending on your OS:

- *.win32.installer.exe (Windows installer)
- *.win32.zip (Windows zip archive)
- *.linux-i686.tar.bz2 (32-bit Linux tar.bz2 archive)
- *.linux-x86_64.tar.bz2 (64-bit Linux tar.bz2 archive)
- *.mac.dmg (Mac "Universal build" disk image with both 32- and 64-bit
executables)

In each case a *.txt file accompanies the archive, giving the "build ID"
timestamp and the mozilla-central and comm-central changesets used for the
build.

Installation procedures vary from OS to OS but I suppose you are familiar with
those that apply to you.

(In reply to comment #1)
> accepted.  shouldn't be a big deal to fix -likely a change in the xul which
> needs to be mirrored with a new version specific a new version specific
> specific overlay.
> 
> is current folder toolbar'still visible? 

Nothing that pertains to QuickFolders can be seen. The mailer chrome looks OK,
as if QF wasn't installed.

> 
> Any errors in route console? 
> 

On the stdout/stderr log I see the following

*** LOG addons.xpi: New add-on quickfolders@curious.be installed in app-profile
*** LOG addons.xpi: Migrating data from old database
*** LOG addons.xpi: Migrating compatibility info
*** LOG addons.xpi-utils: Make addon app-profile:quickfolders@curious.be
visible

and further down (I replace sequences of messages from other extensions by one
empty line each):

JavaScript error: chrome://quickfolders/content/quickfolders.js, line 668:
EventListener is not defined
JavaScript error: chrome://quickfolders/content/quickfolders-listener.js, line
4: QuickFolders is undefined
JavaScript error: chrome://quickfolders/content/quickfolders-preferences.js,
line 409: QuickFolders is undefined
JavaScript error: chrome://quickfolders/content/quickfolders-themes.js, line
114: QuickFolders is undefined
JavaScript error: chrome://quickfolders/content/quickfolders-util.js, line 11:
QuickFolders is undefined

JavaScript error: chrome://quickfolders/content/quickfolders-interface.js, line
10: QuickFolders is undefined
JavaScript error: chrome://quickfolders/content/quickfolders-model.js, line
337: QuickFolders is undefined
JavaScript error: chrome://quickfolders/content/quickfolders-change-order.js,
line 112: QuickFolders is undefined
JavaScript error:
chrome://quickfolders/content/quickfolders-folder-category.js, line 223:
QuickFolders is undefined
JavaScript error: chrome://quickfolders/content/qf-styles.js, line 205:
QuickFolders is undefined

JavaScript error: chrome://quickfolders/content/options.js, line 714:
QuickFolders is undefined

JavaScript error: chrome://quickfolders/content/quickfolders.js, line 668:
EventListener is not defined
JavaScript error: chrome://quickfolders/content/quickfolders-listener.js, line
4: QuickFolders is undefined
JavaScript error: chrome://quickfolders/content/quickfolders-preferences.js,
line 409: QuickFolders is undefined
JavaScript error: chrome://quickfolders/content/quickfolders-themes.js, line
114: QuickFolders is undefined
JavaScript error: chrome://quickfolders/content/quickfolders-filterWorker.js,
line 604: QuickFolders is undefined
JavaScript error: chrome://quickfolders/content/quickfolders-util.js, line 11:
QuickFolders is undefined
JavaScript error: chrome://quickfolders/content/quickfolders-interface.js, line
10: QuickFolders is undefined
JavaScript error: chrome://quickfolders/content/quickfolders-change-order.js,
line 112: QuickFolders is undefined
JavaScript error: chrome://quickfolders/content/quickfolders-model.js, line
337: QuickFolders is undefined
JavaScript error:
chrome://quickfolders/content/quickfolders-folder-category.js, line 223:
QuickFolders is undefined
JavaScript error: chrome://quickfolders/content/qf-styles.js, line 205:
QuickFolders is undefined
JavaScript error: chrome://quickfolders/content/scrollPatch/scrollMenus.xul,
line 18: QuickFolders is undefined

Using Sm Nightly 2.23a I am getting the following errors in console2:

Error: ReferenceError: EventListener is not defined
Source file: chrome://quickfolders/content/quickfolders.js
Line: 666
 ----------
Error: TypeError: QuickFolders is undefined
Source file: chrome://quickfolders/content/quickfolders-listener.js
Line: 4
 ----------
Error: TypeError: QuickFolders is undefined
Source file: chrome://quickfolders/content/quickfolders-preferences.js
Line: 409
 ----------
Error: TypeError: QuickFolders is undefined
Source file: chrome://quickfolders/content/quickfolders-themes.js
Line: 114

...

I think this is due a to missing global variable, expect a bugfix shortly

Created an attachment (id=7650) [details]
3.12 prerelase 56

Here is a quick fix. Works for me.

(In reply to comment #6)
> Created an attachment (id=7650) [details] [details]
> 3.12 prerelase 56
> 
> Here is a quick fix. Works for me.
> 

Mozilla/5.0 (X11; Linux x86_64; rv:26.0) Gecko/20100101 Firefox/26.0
SeaMonkey/2.23a1 ID:20130811003001 c-c:0613efa3898e m-c:3d20597e0a07

QF 3.12pre56

Yes, both toolbars have reappeared