We have exactly this situation.  Did anyone find a solution?

Symptoms: initially had the "blank $wgScriptPath" problem, which we fixed 
as per 
https://github.com/pediapress/Collection/commit/bf83e7689f76a47802ace1266832ee93d8efc2cd

Now we get a PDF download but that download has nothing except standard 
headings, eg. a download for a single page just has a page header, page 
number, and "Article Sources and Contributors" and "License" headings.  A 
download for a book that I created has the title page, table of contents, 
chapter headings, and the "Article Sources and Contributors" and "License" 
headings -- but no actual content!

I agree with the previous poster's suggestion that this might be related to 
the $wgScriptPath problem.  For instance, it might have something to do 
with this:

$ grep wgScriptPath Collection.templates.php 
        $mediapath = $GLOBALS['wgScriptPath'] . 
'/extensions/Collection/images/';
        global $wgScript, $wgScriptPath;
        $mediapath = $wgScriptPath . '/extensions/Collection/images/';
        $mediapath = $GLOBALS['wgScriptPath'] . 
'/extensions/Collection/images/';

I'm going to try and find a workaround similar to the one applied to 
Collection.body.php and see what I get out of it.

A.

On Thursday, 16 May 2013 10:18:39 UTC+10, Joseph Messerschmidt wrote:
>
> Server does not produce any errors when generating a PDF. The Collection 
> extension is almost certainly the issue, rather than the mwlib install. 
> Rendering test content through the command line on the mwlib server works 
> flawlessly. I also get the same results with the 1.5.1 version of the 
> Collection extension. I believe this is related to the known issue of 
> having an empty wgScriptPath variable as I have run into that problem 
> before and implemented a suggested workaround to even get this far.
>
>
>
> On Wednesday, May 1, 2013 10:43:22 PM UTC-7, Balkrishna Darji wrote:
>>
>> Can you paste any errors that you see. may be from logs. or if you are 
>> running the server through console in wait-mode, there are messages it 
>> prints. you should try to print the commands and execute from command line 
>> to see whats causing the issues. for this you will need to look at the code 
>> i think collection.hooks or collection.body.
>>
>>
>> On Wed, May 1, 2013 at 11:15 PM, Joseph Messerschmidt <
>> [email protected]> wrote:
>>
>>> Anyone?
>>>
>>> On Thursday, November 8, 2012 10:26:54 AM UTC-8, Joseph Messerschmidt 
>>> wrote:
>>>>
>>>> I am able to get single articles to render without issue, however 
>>>> collections of articles do not. The generated PDF from a collection just 
>>>> displays mostly blank pages with the chapter headings/titles. There is one 
>>>> title per page but no content between them. Article sources and 
>>>> contributors is likewise blank.
>>>>
>>>> MediaWiki <https://www.mediawiki.org/> 1.19.2PHP <http://www.php.net/> 
>>>> 5.3.15 
>>>> (apache2handler)MySQL <http://www.mysql.com/> 5.5.23
>>>> Collection extension is version 1.6.1.
>>>>
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