Due to the problems with the database this week all combined user stats have been renumbered. This is the unique ID used at BOINCstats to identify a combined user stat. Not to be confused with the CPID or the BAM! id!!
As a result, the link for the default signature has changed as well. Please look on your detailed stats page for the new link.
Customized BAM! signatures are not affected, team, country and host stats or stats for the projects are also not affected.