Unlike closed, proprietary software, OSS is subjected to intense, constant peer-review.
Bugs are much more likely to be found early, and reported to the maintainers.
Knowledge of a bug makes bug-finding easier. Peer review prevents this in official version. Always use official, trusted sources. Unix doesn't count time using two digits, but rather is counted in number of seconds since January 1, 1970. A 32-bit system such as x86 Linux should thus have no date problems through the year 2038.