#2 (Arturus Magi)
Political parties are limited to 18, and have to be sequential. If there are any gaps, things break.
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#6 (Moser the Alchemist)
I currently have 20 parties and so far, as long as they are numbered 0-19 sequentially, there appears to be no problems.
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There was a six month gap between my post and yours, so another bug may have been causing this. That said, I still haven't had much success with more than 18 parties.
#2 (Arturus Magi)
Techs: no known limit, verified good to at least 13130 by myself. I do have a tech that seems to automatically research itself at the start of the game. I don't know if it's a flaw in the tech definition or somethign else, though.
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An update on this: I recently have run into a problem with techs having incorrect morality requirements (Illegal Arts is most definately not a good-aligned tech).
I don't know if it's a problem with the number of techs I have now (I now have a total of about 1500 active techs, but none with numbers outside the range of the prior known valid tech IDs, previously it was 1100 but with rediculously high ID numbers), or if it's an array overrun from one of the other mod types.
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