When using callout shapes, I get the following error from pdflatex:
! Undefined control sequence.
\pgf@sh@bg@rectangle callout ...f@sh@np@\pgf@test
\noexpand \endcsname }\ede...
This is a known bug, a workaround is discussed at
Please, incorporate the sugested fix to portage until a new version is released without the bug.
Created attachment 304133 [details, diff]
Fix for the bug.
Created attachment 304135 [details, diff]
Changes the ebuild to use the callouts patch.
+*pgf-3.0.0 (15 Mar 2014)
+ 15 Mar 2014; Alexis Ballier <email@example.com> +pgf-3.0.0.ebuild:
+ Version bump, bug #497436. Fixes bugs #406783 and #399087. Symlink docs from
+ the texmf tree so that texdoc finds it, bug #441874.