Graphics, Figures & Tables ⇒ Add graphic makes whole text bold

[Singularity]

When I add a graphic to the following code, all of the text, whether math mode or regular text, becomes bold.

Following is my original code. Notice, usepackage{graphicx} and \includegraphics are commented. You probably don't need to read the equation (I left it in because I think it might be causing my issue).

Code: Select all

\documentclass[11pt,fleqn,reqno]{amsart}
\usepackage{amssymb} %amsthm,amsmath included in amsart documentclass
%\usepackage[pdftex]{graphicx}  %For including graphic images (\includegraphics)

\renewcommand{\labelenumi}{\textbf{\alph{enumi}}.}

\setlength{\parindent}{0pt}
\setlength{\parskip}{\baselineskip}

\begin{document}

\subsection{6.3} Consider the following problem: \\
\begin{alignat*}{5}
	\text{Maximize:}\qquad		&&-	&x_1 &\;+	&\;	3	&x_2	&		   		& 		\\
	\text{subject to:}\qquad	&&2	&x_1 &\;+	&\;	3	&x_2	&\;\le\;	&  6	\\
														&&	&x_1 &\;-	&\;	3	&x_2	&\;\ge\;	& -3	\\
														&&	&x_1,&		&			&x_2	&\;\ge\;	&  0
\end{alignat*}
\begin{enumerate}
	\item Solve the problem graphically.
%		\includegraphics{Q6_03_fig.png}
		
	\item State the dual and solve it graphically. Utilize the theorems of duality to obtain the values of all the primal variables from the optimal dual solution.
\end{enumerate}
\end{document}

At this point, everything works pretty well, but I want to add a graphic. First, uncomment the \usebackage[pdftex]{graphicx} command; nothing changes (as expected).

Next, I uncomment the line \includegraphics{Q06_03_fig.png}. The image is included adequately (though poorly aligned), but all of the text becomes bold (I attached before and after pics). Why is it doing that? (Better yet, tell me how to fix it.) Edit: I can fix the graphic alignment issue by closing the enumeration, but must explicitly set the value of enumi.

(A secondary issue is why do I get the 0.1 in front of the \subsection).

tempQ63before.pdf

uncomment \includegraphics

(51.23 KiB) Downloaded 189 times

tempQ63after.pdf

no \includegraphics line

(54.98 KiB) Downloaded 227 times

[localghost]

Presumably the PNG graphics file has an alpha canal for transparency. Actually this should be no problem with a modern TeX system. Remove the alpha canal with an image manipulation program.

And by the way, you can drop the »pdftex« option for the graphicx package. It will detect on its own which compiler engine is running and use the graphics file in the right format.


Thorsten