From: Tomas Pospisek
The red line graphs all bugs with release-critical severities; the green -line graphs the number of bugs that are actually a concern for the next -release (excluding ignored bugs, bugs on packages not in testing, and bugs -whose tags and/or versioning information indicate that they don't apply to -testing), and the blue line graphs the number of bugs that are a concern -for the current stable release.
++ The red line graphs all bugs with release-critical severities; the green + line graphs the number of bugs that are actually a concern for the next + release (excluding ignored bugs, bugs on packages not in testing, and bugs + whose tags and/or versioning information indicate that they don't apply to + testing), and the blue line graphs the number of bugs that are a concern + for the current stable release. +