Last modified: 2012-04-12 13:54:40 UTC
Assume the normalized name of Special:A is Special:B When I'm requesting index.php?title=Special:A¶m I'm redirected to index.php?title=Special:B. ¶m is lost.
The param are checked for validation and only valid params are there after the redirect. Example: index.php?title=Special:Ipblocklist&ip=username index.php?title=Special:BlockList&ip=username
Closing as WONTFIX since the described behavior is as designed.
The fact is that A is provided in an extension and B is its localized name in a certain language. When no validation is specified by the extension author I guess we should assume all params are useful. btw. How to write validation code in an extension?