In Qt v3.3.8 QDateTime::fromString() calculates wrong day when the day is more than 1 digit. This bug affects cervisia, when it parses cvs dates. The patch has been tested with x11-libs/qt-3.3.8-r4 in local overlay.
Created attachment 139233 [details, diff] qt-3.3.8 patch
Created attachment 139235 [details, diff] patch for latest qt-3.3.8-r4.ebuild
This patch was applied upstream and is available in version 3.3.8b.