Wow, nice community: lots of hints here in the past few messages. :) Please forgive my elaborate writing in this post: I do this merely to help other users in the future who tend to search for solutions, to make this story absolutely not vague. If you look at the INX file of that extension,you will ...

The reason I looked up the error log was indeed that the extension wasn't being shown in the menus, which it should have according to the linked wiki. I *assume* that the other person meant by "installing the extension manually" that he/she indeed installed a 3rd party plugin. I took that ...

I'm using inkscape version "Inkscape 0.48.3.1 r9886 (Jan 29 2013)", installed by the ubuntu package manager (ubuntu 12.04). I'm looking to use one of the built-in extensions, LaTeX Formula, which, according to this wiki page , should work out of the box provided the dependencies are instal...