Hi, [Ricardo Rodriguez] eBioTIC. wrote: I confirm this behaviour at least working on a XE/XEM 2.4.1 installation with Firefox 3.6.11 on Mac OS X 10.5.8 as client. It seems that even though: RFC2109 section 4.1 states that the the cookie name (attr) is of type "token". RFC2068 section 2.2 defines type "token" as any chars excluding control characters and special characters, and... RFC2068 lists special characters as tspecials = "(" | ")" | "<" | ">" | "@" | "," | ";" | ":" | "\" | <"> | "/" | "[" | "]" | "?" | "=" | "{" | "}" | SP | HT (see http://bugs.python.org/issue2193) ... it is common to find colon in cookies' name. Colon causes cookies malfunctioning at least here. I've solved this issue by changing the name of the cookies to... #set($cookieName = "${context.user.replaceAll(':','')}_${panel}") Could anybody confirm this? It was firstly reporte here http://jira.xwiki.org/jira/browse/EPE-19. I've created this Jira Issue http://jira.xwiki.org/jira/browse/XWIKI-5612. Thanks! Cheers, Ricardo -- Ricardo Rodríguez CTO eBioTIC. Life Sciences, Data Modeling and Information Management Systems