Why does Xcode's editor jump upwards whenever I place a Breakpoint?

Whenever I place a breakpoint down in Xcode 3.2.1, for whatever reason the editor likes to jump upwards by 100-200+ lines, losing my place in the source code. This appears to only occur in projects that I've been worked on for a little while, opening/closing them several times. New projects don't have the issue, but eventually develop it.

Any idea on what's causing this (user error, software glitch), and ideally how开发者_运维技巧 to fix it? Cheers!

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This appears to be a glitch in Xcode 3.x. Perhaps when Xcode 4.x gets released Apple will fix this problem.