This bug has also bitten me (when upgrading proftpd). Reading the bug report it seems that this would only happen if you have a strange partitioning configuration. I actually just have a separate /tmp partition [1] as an ext2 FS with 'defaults' and this happens also to me.
Regards Javier [1] To prevent a program for overflooding '/' and preventing normal system operation. I also have a dedicated /var and /usr partition.
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