Version:           svn833178 (using Devel)
Installed from:    Compiled sources
Compiler:          gcc 4.3.1 
OS:                Linux

if string contains date in wrong format, parseRFCDate (or parseISODate) returns 2^32-1

result: some apps (akregator) don't know about error, because returned value uint32_t(-1) is not expected time_t(-1)=uint64_t(-1). This leads to wrong dates being displayed

Problem is located between Qt 4 and KDateTime.

KDateTime::toTime_t() returns time_t (64bit at least on my computer)
but
QDateTime::toTime_t() returns uint (32bit)

QDateTime's -1 is converted to 4294967295, but error is tested for -1

solution: QDateTime's return type is small, should be time_t, not uint

fix: Don't test for -1 but do QDateTime/KDateTime::isValid() tests