Search does not find anything under special circumstances

Searching the word "Atlassian*" (* lucene wildcard) does not find any result.
http://confluence.atlassian.com/dosearchsite.action?queryString=Atlassian*&where=conf_all&type=&lastModified=&contributor=&contributorUsername=

"atlassian" finds something
"atlassian*" finds something
"Atlassian" finds something
"Atlassian*" finds nothing