Videos only show the upper left-hand portion of the image when playing.

When I attempt to play a video in Firefox (23.0) on my Mac, all I can see is the upper left-hand fourth of the video image.
When I attempt to view the same video in Safari it works fine. The entire image is rendered.
Mac OS X 10.8.4

I have this problem too, but only on my MBP with retina display. When I move the Firefox window to the attached external (non-retina) display, the full video is visible. And moving the FF window back, 3/4 of the video disappear again...
* I run the latest version of the Adobe Flash plugin (11,8,800,94 )
* running FF in 'Safe Mode' doesn't solve the problem
* 'Use Hardware Acceleration when available' is not checked
* apparently there's no 'protected mode' for FF an Flash on OS X
A Firefox Reset is not an acceptable solution for me.
Any other hints how I could try to solve this problem?

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All my div s pile up in the upper left-hand corner

Trying my hand at following Dreamweaver tutorial instructions
for making a CSS layout with absolute positioning, rather than
starting with pre-tested code, and not having much luck. Page looks
fine in DW 8.0.2/Mac Design window. However when previewing the
page in Safari, all the divs place themselves in the upper
left-hand corner, not in their "absolute" positions on the page.
There are a few graphics in the banner that touch rather than
leaving a 1px gap. That is the only area where I strayed from the
instructions in the tutorial I believe.
Beginning of page code attached. Thanks.

Yeah, me too
Walt
"Murray *ACE*" <[email protected]> wrote
in message
news:[email protected]...
> Definitely. He's old now....
>
> --
> Murray --- ICQ 71997575
> Adobe Community Expert
> (If you *MUST* email me, don't LAUGH when you do so!)
> ==================
>
http://www.projectseven.com/go
- DW FAQs, Tutorials & Resources
>
http://www.dwfaq.com - DW FAQs,
Tutorials & Resources
> ==================
>
>
> "Walt F. Schaefer" <[email protected]> wrote
in message
> news:[email protected]...
>>I used to have a close friend named John Barleycorn.
Does that count?
>>
>> --
>>
>> Walt
>>
>>
>> "Murray *ACE*"
<[email protected]> wrote in message
>> news:[email protected]...
>>> But have you ever done one in barleycorns?
>>>
>>> --
>>> Murray --- ICQ 71997575
>>> Adobe Community Expert
>>> (If you *MUST* email me, don't LAUGH when you do
so!)
>>> ==================
>>>
http://www.projectseven.com/go
- DW FAQs, Tutorials & Resources
>>>
http://www.dwfaq.com - DW FAQs,
Tutorials & Resources
>>> ==================
>>>
>>>
>>> "Walt F. Schaefer" <[email protected]>
wrote in message
>>> news:[email protected]...
>>>> Drat! I thought I was the only one designing
in parsecs. Back to the
>>>> drawing board...
>>>>
>>>> --
>>>>
>>>> Walt
>>>>
>>>>
>>>> "Murray *ACE*"
<[email protected]> wrote in message
>>>> news:[email protected]...
>>>>>> Trying my hand at following
Dreamweaver tutorial instructions for
>>>>>> making a CSS
>>>>>> layout with absolute positioning
>>>>>
>>>>> STOP!!!
>>>>>
>>>>> You are already going the wrong way on
the one-way street. Absolute
>>>>> positioning is NOT a method for page
layout. It's a special-purpose
>>>>> tool that is rarely needed. See this -
>>>>>
>>>>>
http://apptools.com/examples/pagelayout101.php
>>>>>
>>>>>> However when previewing the page in
Safari, all the divs place
>>>>>> themselves in
>>>>>> the upper left-hand corner, not in
their "absolute" positions on the
>>>>>> page.
>>>>>
>>>>> That would be because you have not
specified whether these numbers are
>>>>> yards, or miles, or parsecs. All
dimension/position values must be
>>>>> accompanied by a unit
>>>>>
>>>>>> left:160;
>>>>>> top:190;
>>>>>> width:580;
>>>>>> height:1000;
>>>>>
>>>>> For example - left:160px;
>>>>>
>>>>> But just don't go there at all.
>>>>>
>>>>> --
>>>>> Murray --- ICQ 71997575
>>>>> Adobe Community Expert
>>>>> (If you *MUST* email me, don't LAUGH
when you do so!)
>>>>> ==================
>>>>>
http://www.projectseven.com/go
- DW FAQs, Tutorials & Resources
>>>>>
http://www.dwfaq.com - DW FAQs,
Tutorials & Resources
>>>>> ==================
>>>>>
>>>>>
>>>>> "D Forrest"
<[email protected]> wrote in message
>>>>>
news:[email protected]...
>>>>>> Trying my hand at following
Dreamweaver tutorial instructions for
>>>>>> making a CSS
>>>>>> layout with absolute positioning,
rather than starting with
>>>>>> pre-tested code,
>>>>>> and not having much luck. Page looks
fine in DW 8.0.2/Mac Design
>>>>>> window.
>>>>>> However when previewing the page in
Safari, all the divs place
>>>>>> themselves in
>>>>>> the upper left-hand corner, not in
their "absolute" positions on the
>>>>>> page.
>>>>>>
>>>>>> There are a few graphics in the
banner that touch rather than leaving
>>>>>> a 1px
>>>>>> gap. That is the only area where I
strayed from the instructions in
>>>>>> the
>>>>>> tutorial I believe.
>>>>>>
>>>>>> Beginning of page code attached.
Thanks.
>>>>>>
>>>>>> <!DOCTYPE html PUBLIC
"-//W3C//DTD XHTML 1.0 Transitional//EN"
>>>>>> "
http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
>>>>>> <html xmlns="
http://www.w3.org/1999/xhtml">
>>>>>> <head>
>>>>>> <meta http-equiv="Content-Type"
content="text/html;
>>>>>> charset=ISO-8859-1" />
>>>>>> <title>The Time Lords Courses
| Home Page</title>
>>>>>> <link href="timelordscourse.css"
rel="stylesheet" type="text/css"
>>>>>> media="screen" />
>>>>>> <style type="text/css">
>>>>>> <!--
>>>>>> #main_content {
>>>>>> position:absolute;
>>>>>> left:160;
>>>>>> top:190;
>>>>>> width:580;
>>>>>> height:1000;
>>>>>> z-index:1;
>>>>>> }
>>>>>> #breadcrumbs {
>>>>>> position:absolute;
>>>>>> left:160;
>>>>>> top:160;
>>>>>> width:580;
>>>>>> height:29;
>>>>>> z-index:2;
>>>>>> }
>>>>>> #time_lords_logo {
>>>>>> position:absolute;
>>>>>> left:0;
>>>>>> top:0;
>>>>>> width:160;
>>>>>> height:150;
>>>>>> z-index:3;
>>>>>> }
>>>>>> #clarity {
>>>>>> position:absolute;
>>>>>> left:160;
>>>>>> top:0;
>>>>>> width:200;
>>>>>> height:150;
>>>>>> z-index:4;
>>>>>> }
>>>>>> #inspiration {
>>>>>> position:absolute;
>>>>>> left:360;
>>>>>> top:0;
>>>>>> width:190;
>>>>>> height:150;
>>>>>> z-index:5;
>>>>>> }
>>>>>> #selfconfidence {
>>>>>> position:absolute;
>>>>>> left:550;
>>>>>> top:0;
>>>>>> width:190;
>>>>>> height:150;
>>>>>> z-index:6;
>>>>>> }
>>>>>> #side_nav {
>>>>>> position:absolute;
>>>>>> left:12;
>>>>>> top:190;
>>>>>> width:120;
>>>>>> height:500;
>>>>>> z-index:7;
>>>>>> }
>>>>>>
>>>>>
>>>>
>>>>
>>>
>>
>>
>

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