On 20 feb 2008, at 10:11, Martin Schröder wrote:

2008/2/20, Michal Kvasnička :

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pdfTeX is 3.141592-1.40.3 (Web2C 7.5.6)

Update your pdftex. It's a bug we fixed in 1.40.6.

Best Martin

I compiled 1.40.6 on MacOSX-10.5.2 and found that the pdf it generated was defective. Neither Adobe Reader nor TeXShop could read it. Reverting to a fresh compile of 1.40.5 remedied that. Could it be that the changes in 1.40.6 badly effect MacOSX users only? Hans van der Meer

Martin, Happy message. The error occurring in pdftex 1.40.6 apparently has vanished in 1.40.7. Now pdf's are produced here on a simple testrun. Hans van der Meer On 20 feb 2008, at 13:03, Martin Schröder wrote:

2008/2/20, Hans van der Meer :

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I compiled 1.40.6 on MacOSX-10.5.2 and found that the pdf it generated was defective. Neither Adobe Reader nor TeXShop could read it.

Try 1.40.7. :-)

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Reverting to a fresh compile of 1.40.5 remedied that. Could it be that the changes in 1.40.6 badly effect MacOSX users only?

Maybe. 1.40.7 works for me on Linux. :-)

Best Martin

2008/2/20, Michal Kvasnička :

However, there seems to be one more strange thing (not that big): If I include some transparent stuff on a light background (i.e. a metapost figure on a light gray screen), there's a visible rectangle around it (on the screen). Don't you what's the cause and how to solve it?

Probably a bug in Adobe Reader. We don't draw rectangles around included images. :-) Best Martin

Many thanks for your answer.

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If I include some transparent stuff on a light background (i.e. a

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metapost figure on a light gray screen), there's a visible rectangle around it (on the screen).

Yes, it's unfortunately normal at least in Acrobat 7 and 8, also in

Apple's PDF viewer (in Preview, Mail etc.). In my experience esp. transparent (or flattened) elements show a fine white border - but if you zoom in, it stays the same fine line or sometimes disappeares. And it never shows in print.

However, what I meant was slightly different: not a tiny white line around but a solid (full) rectangle with light gray background. You can see it here: http://www.econ.muni.cz/~qasar/tmp/inst-slide02.pdf, page 3 (the ugly background in the figure on the page 2 is my fault). I guess the light gray background might be another bug in the AdobeReader, since it's not visible in xpdf. However, I thought so with the previous bug (it was visible in the AdobeReader, but not in the xpdf too), and it was actually a bug in the pdfTeX. Have you any idea what's wrong? (Well, this is much less annoying than the previous problem.) Many thanks and greeting from rainy Brno. Michal

Hans Hagen wrote:

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However, what I meant was slightly different: not a tiny white line around but a solid (full) rectangle with light gray background. You can see it here: http://www.econ.muni.cz/~qasar/tmp/inst-slide02.pdf, page 3 (the ugly background in the figure on the page 2 is my fault).

I am looking at in in AR 7.0.8 on linux, and it looks fine, no weird artifacts at all. Best wishes, Taco

Oops. You've seen my Marx pictures. I'm ashamed I was caught. :-( (Well, no, I'm not a Marxist.) :-) I think the alpha channel is not the cause, since I can see the light gray rectangles under the MetaPost figures, not under PNG with transparency. I don't know how precisely the transparency is done in the MetaPost, but I guess there is no background under curves and shapes I draw in the MetaPost. At least there is nothing visible in the figure on the page 10 of http://www.econ.muni.cz/~qasar/tmp/inst-slide02.pdf. However, some background is visible under all MetaPost figures on pages 3 to 6. The background under the figures is different from the background around them. Or don't you see it? Then it might be a problem just under some versions of the AdobeReader, perhaps only under Linux. Many thanks for your answers. Have a nice day. Michal 2008/2/21, Hans Hagen :

Michal Kvasnička wrote:

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Many thanks for your answer.

...

...

If I include some transparent stuff on a light background (i.e. a

...

metapost figure on a light gray screen), there's a visible rectangle around it (on the screen). Yes, it's unfortunately normal at least in Acrobat 7 and 8, also in Apple's PDF viewer (in Preview, Mail etc.). In my experience esp. transparent (or flattened) elements show a fine white border - but if you zoom in, it stays the same fine line or sometimes disappeares. And it never shows in print.

However, what I meant was slightly different: not a tiny white line around but a solid (full) rectangle with light gray background. You can see it here: http://www.econ.muni.cz/~qasar/tmp/inst-slide02.pdf, page 3 (the ugly background in the figure on the page 2 is my fault).

isn't that alpha channel stuff? i never looked into that but your marx picture does not have the gray background .. maybe compare the internals of these graphics adn see what happens inside

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