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In one of my games trying to open the history screen for one of the characters, Comotorios, the Chief of Tylis, causes the game to hang. This should be reproduceable from this savegame (the forum won't let me attach it, by the way, it says my quota is exceeded even though the 'manage attachments' screen says it should allow .zip files up to 123 MB in size - it would be nice to be able to upload savegames directly to the forum, I had to try three file hosting sites before I found one that actually managed to upload the file).
I'll look into the savegame, thanks for reporting.
As for attachments: there are two requirements. Firstly, You need to keep below the file size, as specified in the "Manage Attachments" table (different formats, different filesize). Secondly, You are, at present, only allowed to have 10MB of attached material (be it savegames, pictures, or otherwise).
To check out how much You have left: check Your forum's control panel, "attachment" section - possibly here.