Flash leaves ghost image in browsers, evince, possibly others

[MR ZenWiz]

On Thu, Apr 7, 2011 at 8:40 PM, MR ZenWiz <mrzenwiz at gmail.com> wrote:
> On Thu, Apr 7, 2011 at 11:02 AM, NoOp <glgxg at sbcglobal.net> wrote:
>> On 04/07/2011 12:14 AM, MR ZenWiz wrote:
:
>>>
>>> In fact, the artifact is still there.  I moved the browser window to
>>> my other screen to get away from it, but every other GUI app "sees"
>>> it, too.
>>>
>>
>> Odd. Can you post a screenshot somewhere?
>>
> I'll collect a bunch tomorrow and put them up where y'all can see.  My
> desktop now has an ATI video controller, so I don't see this junk any
> more here.
>
This could be a little harder than I thought - the artifact does not
appear in the screenshot images I took (!).  WAG: could this be caused
by the artifact being on or in a/the frame buffer that does not
contain the main display image?

Now I'll have to get photos and post them.  Foo.

Is there any kind of generic "clear all video buffers" command that
either exists or can be programmed?  I'm pretty good with shell and
C++, though I haven't done any real graphics programming in decades.