As the title. I think I was on wave 240 when this happened. The score just became minus and it started going back up from minus. Instead of getting a congradulations screen when I died in wave 254, I got "awww, so close!" message and no highest score recored. The correct score should have been around 2700000000.

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Hmm.....just realise this is mentioned in the other forum......
this is a bug and should be in the support forum. Whats the status of this Dave? Did you figure out what was causing it. Whats the repro rate. Is it happening to everyone? Does the 1.1 update fix it, you hope?
Been through every level on the game, this one is the end game. The level with the most replay value for me and I'm getting in the 2 billi range so I don't wanna get a really good run and get fuxored.
Let us know and I would be happy to do some testing on the matter/keep you updated after the 1.1 update is released if you think you fixed it.
also just a side note. anyone got any tips on performance issues? after wave 200+ there is so much ish happening its hard/slow/scarry to try to delete a tower and place a new one for optimal end pwnage, things are slowing down a bit. This is when/where its coming down to who gets the best top score so I feel it's important.