[O] Version 7.5: org-export-html-preamble no longer supports function

[Bill Jackson]

In version 7.4, org-export-html-preamble and org-export-html-postamble 
could be set to the name of a function that was passed an option plist.  
This appears to no longer be supported in 7.5.

I used this functionality when publishing to generate a preamble and 
postamble to integrate the generated pages into my website, which 
included a common page layout, header bar, and footer.  I was able to 
define options in org-export-inbuffer-options-extra, define values for 
these options in a .org file, and incorporate them into the preamble via 
the option plist passed to the org-export-html-preamble function.

Is there another way in version 7.5 that I can generate custom preambles 
and postambles incorporating variables from each file at the time of 
publishing?


With much thanks,
Bill