Error number 4001 in 4 ... Encountered: "q" (113), after : "&"

Hello, I get a jsp error on my home page, and I noticed there is the same problem in the sandbox: http://www.xwiki.org/xwiki/bin/view/Sandbox/notcamelcaselink Error number 4001 in 4: Error while parsing velocity page Sandbox.notcamelcaselink Wrapped Exception: Lexical error: org.apache.velocity.runtime.parser.TokenMgrError: Lexical error at line 4, column 89. Encountered: "q" (113), after : "&" <http://www.xwiki.org/xwiki/bin/view/Sandbox/notcamelcaselink> Is it a known issue ? A configuration problem ? Should I report a bug ? Thanks, -Benoit