diff --git a/.gitignore b/.gitignore
index 4bb64e5..8d4bf3e 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,20 +1,21 @@
 *~
 auto/
 *.aux
 *.bbl
 *.blg
 *.log
 main.pdf
 *.mk
 *.nav
 notes.config
 *.out
 *.pdfpc
 _region_.*
 *.snm
 *-stamp
 *.tmp
 *.toc
 *.vrb
 common/modules/pdf/
 .directory
+_minted*/
diff --git a/common/bin/export-org-to-beamer b/common/bin/export-org-to-beamer
index 8cc77d5..ebd622c 100755
--- a/common/bin/export-org-to-beamer
+++ b/common/bin/export-org-to-beamer
@@ -1,25 +1,26 @@
 #!/bin/bash
 #
 # this is horrible... quotes all around :-(
 #
 # but creating a temporary file like in
 #
 # cat > /tmp/export.$$ <<EOF
 # (progn
 #   (require 'ox-beamer)
 #   (add-to-list 'org-beamer-environments-extra '("picblock"  "P" "\\begin{picblock}%o{%h}"      "\\end{picblock}"))
 #   (org-beamer-export-to-latex)
 #   )
 # EOF
 # /usr/bin/emacs $1 --batch --eval="(load-file \"/tmp/export.$$\")"
 # rm /tmp/export.$$
 #
 # is horrible too :-(
 #
 
 /usr/bin/emacs $1 --batch --eval="\
 (progn \
   (require 'ox-beamer) \
   (add-to-list 'org-beamer-environments-extra '(\"picblock\"  \"P\" \"\\\\begin{picblock}%o{%h}\"      \"\\\\end{picblock}\")) \
+  (setq org-confirm-babel-evaluate nil) \
   (org-beamer-export-to-latex) \
   )"
diff --git a/talks-public/Makefile.slides b/talks-public/Makefile.slides
index c057acd..1d4bd01 100644
--- a/talks-public/Makefile.slides
+++ b/talks-public/Makefile.slides
@@ -1,31 +1,31 @@
 # Depends: rubber
 
 ORGS = $(wildcard *.org)
 TEXHOS = $(patsubst %.org,%.handout.tex,$(ORGS))
 TEXS = $(patsubst %.org,%.tex,$(ORGS))
 PDFS = $(patsubst %.org,%.pdf,$(ORGS))
 PDFHOS = $(patsubst %.org,%.handout.pdf,$(ORGS))
 
 export TEXINPUTS = :$(CURDIR)/../../common/latex/
 
 all: $(PDFS)
 
 handouts: $(PDFHOS)
 
 .PRECIOUS: $(TEXS)
 %.tex: %.org
 	../bin/export-org-to-beamer $<
 
 %.pdf: %.tex
-	rubber -m pdftex $<
+	rubber --unsafe -m pdftex $<
 
 %.handout.tex: %.tex
 	sed 's/\\documentclass[[]/\\documentclass[handout,/' $< > $@
 
 clean: $(patsubst %,%/clean,$(TEXS) $(TEXHOS))
 
 %/clean:
 	if [ -f $* ]; then rubber -m pdftex --clean $* ; fi
 	rm -f $*
 
 distclean: clean
diff --git a/talks-public/bin/export-org-to-beamer b/talks-public/bin/export-org-to-beamer
index 8cc77d5..ebd622c 100755
--- a/talks-public/bin/export-org-to-beamer
+++ b/talks-public/bin/export-org-to-beamer
@@ -1,25 +1,26 @@
 #!/bin/bash
 #
 # this is horrible... quotes all around :-(
 #
 # but creating a temporary file like in
 #
 # cat > /tmp/export.$$ <<EOF
 # (progn
 #   (require 'ox-beamer)
 #   (add-to-list 'org-beamer-environments-extra '("picblock"  "P" "\\begin{picblock}%o{%h}"      "\\end{picblock}"))
 #   (org-beamer-export-to-latex)
 #   )
 # EOF
 # /usr/bin/emacs $1 --batch --eval="(load-file \"/tmp/export.$$\")"
 # rm /tmp/export.$$
 #
 # is horrible too :-(
 #
 
 /usr/bin/emacs $1 --batch --eval="\
 (progn \
   (require 'ox-beamer) \
   (add-to-list 'org-beamer-environments-extra '(\"picblock\"  \"P\" \"\\\\begin{picblock}%o{%h}\"      \"\\\\end{picblock}\")) \
+  (setq org-confirm-babel-evaluate nil) \
   (org-beamer-export-to-latex) \
   )"