[TYPO3] admPanel pencil puzzle

[Bing Du]

> Hi,
>
> Typo3 V4.0.4
>
> Can anybody tell me why the pencil image
> http://somesite.some.edu/typo3/gfx/edit_fe.gif shows up fine in page
> source, but doesn't show up in the page itself?
>
> I have 'page.config.admPanel=1' in the root typoscript setup and have
> 'admPanel {...}' in user/group TSConfig.  I can see the admin panel on the
> page fine.  Just no pencils.
>
> The tricky part is we use pubcookie single sign on for backend
> authentication.  So if logon has never happened,
> http://somesite.some.edu/typo3 will redirect to the university pubcookie
> login page.  However, I've already logged on
> http://somesite.some.edu/typo3 in another window of the same browser
> (firefox), I think pencils should show up on http://somesite.some.edu.
>
> If I go to http://somesite.some.edu/typo3/gfx/edit_fe.gif directly, the
> URL changes to https://somesite.some.edu/typo3/gfx/edit_fe.gif and a
> pencil shows up fine.
>
> I'm totally lost now and would appreciate if anybody could shed some
> light!
>
> Thanks in advance,
>
> Bing
>

A bit more information...

When we used typo3 3.8.0, even though we also used pubcookie single sign
on, we had no problem with frontend editing pencil icons because in the
older versions before typo3 4.0, the pencil image path was
t3lib/gfx/edit_fe.gif.

Bing