Just for developers to know: I've noticed that when I am setting up my tactics for a game, if the Active Bids -box on the right happens to update itself at that time, it seems to mess up the tactics so that it will end up in error page when I press "Send tactics". Not a major issue obviously, but it might hurt you if you have many transferlisted players bookmarked ---> many soon ending auctions ---> Active Bids -box must update itself very often.
It could of course have been some other reason (as it is still offseason time), but after many tries errorpage as a result of sending my tactics always seemed to be when the Active Bids -box had updated itself during I had tactics settings open.
Hope this helps you, and sorry if this is a repetition of an already known issue.