since the last update (v1.1k) of the biblatex-ieee package the protection of capital letters for the whole title doesn't work anymore. I am using misc as entrytype and I want to keep the whole title as it is by using {{Title...}}.
@MISC{bibkey,
author = {D. Duck},
title = {{Skriptum zur VU Automatisierung (WS 2014/15)}},
year = {2014},
address = {Institut XYZ, Universität ABC}
}
I figured out that v1.1k introduced the command \bbx@colon@search to capitalise after colon in titles. (That command takes two arguments, but with my brackets there is only one available. Thats the problem, isn't it?)
Without this new command everything works fine for me as it does in older versions.
So is the way I use the brackets wrong? Or is it a problem with the last update?
Thanks for your help.
PS: I am using bibtex with biber with the following minimal example:
\documentclass{article}
\usepackage[backend=biber, style=ieee]{biblatex}
\addbibresource{bibliography.bib}
\begin{document}
Test \cite{bibkey}
\printbibliography{}
\end{document}

\bbx@colon@searchas you say, though the trouble should not be the number of arguments. This is really more something you should report as a bug as Joseph Wright points out. For the time being\DeclareFieldFormat{titlecase}{\MakeCapital{#1}} \DeclareFieldFormat{sentencecase}{\MakeSentenceCase{#1}}is a work-around that disables this new capitalise-after-colon feature. – moewe Mar 19 '15 at 10:24\makeatletter \long\def\bbx@colon@search@aux#1#2: #3\stop{% #1#2% \ifblank{#3} {} {% : % \bbx@colon@search@aux#1#3\stop }% }. \makeatother(modulo line breaks). – moewe Mar 19 '15 at 10:28biblatex-ieeeon github. See bug report, the fix is not yet on CTAN. – moewe Mar 25 '15 at 14:28