It was an Adobe Reader issue. This helped eliminating the nagging window...

Cancel preparing untagged document for reading
http://www.acrobatusers.com/forums/aucbb/viewtopic.php?id=2478
Alan


On Tue, Feb 24, 2009 at 10:34 PM, Alan Stone
<software.list.1es9s@gmail.com>wrote:

>  On Tue, Feb 24, 2009 at 2:23 PM, Hans Hagen <pragma@wxs.nl> wrote:
>
>> Alan Stone wrote:
>>
>>> It's a portable with Intel Core Duo CPU P8400 2.26 GHz, 4Gb memory.
>>>
>>
>> hm, then rendering shoul dbe ok; maybe there is something special with
>> your documents
>
>
> Wouldn't know what's so special about them: picture(s), text, some
> interactive elements, Windows ttf fonts. As it didn't occur when openening
> the pdf's in Windows XP and Linux, it has something to do with Vista.
>
> Alan
>