thanks for the report, glad michal already fixed it :).

Hi,

The following example:

%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
\begin{filecontents}{testbib.bib}
@ARTICLE{testentry1,
AUTHOR = {Article author},
TITLE = {Articletitle},
JOURNAL = {Test Journal},
YEAR = {2012},
}
\end{filecontents}
\listfiles
\documentclass{article}
\usepackage[backend=bibtex]{biblatex}
\bibliography{testbib}
\begin{document}
\nocite{testentry1}
\printbibliography
\end{document}
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%

compiles well in pdflatex, but with htlatex I get the error

"Argument of \blx@bibliography has an extra }. ..."

(using miktex with all packages updated from CTAN, and using the updated biblatex.4ht version from https://tex.stackexchange.com/questions/408742/error-with-latest-tex4ebook-and-biblatex-using-texlive-2017-windows).

Best regards

Kristian