Rails - Sep 2010 - option_groups_from_collection_for_select

Hi,

in my development environment (Ruby 1.87, Rails 2.3.8) the following
code works fine:

<%= select "applicant", "member_1",
option_groups_from_collection_for_select(@topics, :members, :topic, :id,
:name, @applicant.member_1), {:include_blank => true} %>

Producing:
<optgroup label="Clinical Neuroscience">
<option value="1">Prof ...</option>
<option value="2">Prof ... </option>
...
</optgroup>

Yet in my production environment (Ruby 1.8.7, Rails 2.3.2) this code
produces really weird output, sticking the previous output into an
option value and escaping it:

<option value="&lt;optgroup label=&quot;Clinical
Neuroscience&quot;&gt;&lt;option
value=&quot;1&quot;&gt;Prof...&lt;/option&gt;">&lt;optgroup
label="Clinical Neuroscience"&gt;&lt;option
value="1"&gt;Prof...&lt;/option&gt;
</option>

Does anyone know why this is?

I have tried googling to find out if
''option_groups_from_collection_for_select'' is compatible with
Rails
2.3.2, but as far as I can tell, it is.

http://apidock.com/rails/v2.3.2/ActionView/Helpers/FormOptionsHelper/option_groups_from_collection_for_select
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So, in case this helps anybody else, I managed to solve the problem by 
updating to 2.3.8 in my production environment.
Turned out to be a version thing after all.
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