[OS X TeX] A bug of Apple pdf routines that affects to TeX ?

Bernhard Barkow bb at creativeeyes.at
Fri Jan 9 03:15:50 EST 2009

On 2009-01-08, at 20:00, Herbert Schulz wrote:
> On Jan 8, 2009, at 10:27 AM, Juan Luis Varona wrote:
>> I think that I have found an irritating bug of Apple pdf routines
>> that affects to TeX in a Mac.
>> I send a example that explain the problem.
>> Thanks in advance,
>> Juan Luis Varona
>> \documentclass[12pt]{article}
>> \title{I think that this shows a bug of Apple pdf routines that  
>> affects to TeX}
>> \author{Juan Luis Varona}
>> \date{}
>> \begin{document}
>> \maketitle
>> Compare the alignement of the third symbol ``$|$'' in the following
>> formulas with~``$+$'' and~``$-$'':
>> $|x| + |y|$
>> $|x| - |y|$
>> In the pdf generated with pdflatex, it is very well aligned.
>> But the alignment fails after~``$-$'' IF YOU PRINT with the Apple  
>> Preview
>> (both in the paper and in a pdf in the hard disk), and also if,  
>> with TeXShop,
>> you print or you select the formulas and drag it to the hard disk  
>> (as a pdf).
>> I do not know the reason, but the~``$|$'' is too close to the~``$- 
>> $'' and
>> too far to the~``$-$''.
>> No similar problem arises printing (in a paper) with Adobe Reader.
>> I do not know where to report this problem (or if it is already  
>> known).
>> Can some guru in the list to help?
>> I have checked the problem with Mac OS X 10.5.2 to 10.5.6
>> (I do not have older Macs).
> I can confirm having this problem with the pdf file produced with  
> pdflatex. Printing via Apple's PDF API adds space between that | and  
> the following y even though the pdf display is correct. It may be a  
> problem (Apple had a bad pdf printing problem in early versions of  
> Leopard) with the printer interface. Since Adobe uses their own  
> printer interface it prints perfectly there.

Maybe a similar issue: using "cmbright" fonts (regular, not bold)  
results in the i's and l's (ell) printed as thin vertical lines when  
printed from Preview or TeXShop, but it works fine from Acrobat.
I have not investigated this so far with other fonts, but I will try…


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