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@Boddunn
It's a beautiful frame but you need to get that seatpost out ASAP!
Ok, panic over, aluminum expands twice as much as steel and I'm sure the rusty (ok, oxidised) seatpost is cracking the seat tube. It's not ideal but the seat tube takes mainly compressive forces so it should be fine as long as you can get the bugger out; caustic soda works well with steel frames and seeing as carbon is inert and epoxy is not far behind it you might as well give it a go. If you leave it in there it will fail, maybe not today, maybe not tomorrow but at some point in the indertermiate future and definitely not for the rest of your life. Not quite so romantic is it?