The following are ideas for distinguishing which application belongs with which version.
For now, if the article is solely dedicated to a specific version, that version number/name needs to be in the title of the article such as Site Architecture 1.5. Here are other examples of possible version-specific titles:
If a small section or application pertains to a specific version, then a couple of choices are possible.
If the version information is critical to the implentation, then it should be set in a heading so it will appear on the table of contents. Set the section title to be version specific, such as Editing Posts in WordPress 1.2 or Editing Posts v1.2.
If version-specific information is found under one section title, such as is often found in the FAQ where the answer to the question is dependent upon the version, put the distinction in bold with a line break after:
'''For v1.6 Only'''<br /> To change the blah with the blah...
For v1.6 Only
To change the blah with the blah and do blah blah, this is what the heading would look like for a specific aspect of the point of the article that concerns a version specific issue. It is not a heading but just a bold title, so it would not show up on the table of contents.
For larger section differences, then we can use the version-specific section banners. I don't expect these to be used as much as the options above.
These are ideas for designating version specific articles and/or sections with template banners.