I managed to find a mysterious portal and so I dared to explore it. When all was said and done I went for the exit portal but it made me crash. I reloaded and tried going to the pocket dimension to see if it crashed, too, and maybe assume it was part of the infamous "Can't go upstairs/PD crash" bug, but it does nothing. As this was my first portal, is it normal that I can't access the PD within the portals? Anyway, I've seen some posts telling affected players to send in their saves, does this case seem suitable? BTW, this is without CotW. Prior to entering the portal the PD worked fine and I could use stairs as usual. It had to happen withing the portal. I went in, died at the hands of something I can't remember, reloaded a manual save I did at the start of the portal and then finished it with no trouble, barring the crash.
Patch 1.11 has some issues with Mysterious Portals crashing. There's a hotfix in the "current bugs" thread that fixes it for now.
Thanks! The hotfix solved it easily. I've played after exiting the portal and haven't crashed or found anything weird. I swear I read the current bugs thread, can't explain how I didn't see the entry about portals.