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I'm trying to write a bidirectional (English/Hebrew) document in xelatex and polyglossia. For some reason, when I enable Hebrew as a secondary language, all the chapter and section titles become right-aligned, even when they are in English. Do you know why this happens?

Here's a simple example:


\chapter{Hello world}

And this is how it looks: The example results

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It is because you are using an ancient version of bidi package. Please update your TeX distribution. The current version of bidi package is 11.158. – Vafa Khalighi Jun 21 '12 at 6:01
Thanks. I had no idea Ubuntu lagged so much behind. Installing the latest tex-live now... – haggai_e Jun 22 '12 at 5:25

As @Vafa Khalighi suggested, Upgrading tex-live to the 2011 version solved the problem.

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In few weeks, TeXLive 2012 will be out. So if you can, install TeXLive 2012 and update your TeX distribution once in a while. – Vafa Khalighi Jun 22 '12 at 9:46

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