Description

This issue seems to affect all Confluence 3.5 and above (New code macro plugin is implemented). Users upgrading from Confluence prior to 3.5 with code macro parameters that have a mixture of uppercase letters will encounter the following error:

code: Invalid value specified for parameter lang

How to Reproduce

1. Create a page in Confluence 3.5
2. Key in {code: None} example {code} under Wiki Markup
   
3. Save the page
4. You will see the following error message displayed:
   
5. Try to edit the page again, if you go over to the Wiki Markup tab, notice that the contents inside the code macro is missing:
   

Workaround

Option 1) Disabling the New Code Macro and install the older Code Macro

1. Go to Confluence Admin >> Plugins >> Code Macro Plugin >> Disable Code Macro Plugin
2. Download the attached confluence-code-macro-1.5.jar (Old code macro)
3. Install this plugin via Confluence Admin >> Plugins >> Install >> Upload Plugin

Option 2) Database search and replace

The following query works on MySQL:

 UPDATE `bodycontent` set body = replace(body, '{code:None}', '{code:none}') 

After performing the query, go to Confluence Admin >> Cache Statistics >> Click on Flush All. The problem should be fixed now.