When I (1) change the color of the mainfont with the fontspec package, (2) put some text in a textblock environment and (3) compile the document with LuaLaTex, the resulting pdf when opened with Adobe Reader 9 displays the following error message:
An error exists on this page. Acrobat may not display the page correctly. Please contact the person who created the PDF document to correct the problem
The document opens correctly and looks all good. However, this error message is annoying and does not look very professional. When I remove the colour specification in \setmainfont options, the error disappears.
Here is a MWE. Also, notice how the hyphens are kept black, unlike the main body of the text which is correctly painted in red:
\documentclass[]{article}
\usepackage[overlay, absolute]{textpos}
\usepackage{xcolor}
\usepackage[]{fontspec}
\setmainfont[Color = red]{Latin Modern Roman}
\begin{document}
\begin{textblock}{5}(5, 5)
LaTeX is a high-quality typesetting system; it includes features designed for the production of technical and scientific documentation. LaTeX is the de facto standard for the communication and publication of scientific documents.
\end{textblock}
\end{document}
Which results in:

I'm working in TeXstudio 2.6.6. in Ubuntu 14.04 LTS. The compilation is done with the following command "lualatex -synctex=1 -interaction=nonstopmode %.tex". The compilation ends without any error or warning.
Am I the only one experiencing this issue or am I doing something wrong?