QNetworkDiskCache incompatible between releases

When we updated from Qt 4.8 to 5.0 we faced the issue that old cache from 4.8 made the Qt 5 application crash. So we had to remove our cache directory.

Now with the update from Qt5.1 to Qt5.2 beta we face the issue that our NetworkAccessManager is simply hanging forever while processing a request. However once we clear the old cache it works fine again.

We use a QNetworkAccessManager for loading our content.
The cache is configured like this:

    QString cacheLocation =
            QStandardPaths::writableLocation(QStandardPaths::CacheLocation);

    if (!cacheLocation.isEmpty()) {
        cacheLocation += QLatin1String("/httpCache");

        QNetworkDiskCache *diskCache = new QNetworkDiskCache(this);
        diskCache->setCacheDirectory(cacheLocation);
        mNetworkAccessManager.setCache(diskCache);
    } else {
        qWarning() << "CacheLocation is not supported on this platform, "
                      "no disk cache is used!";
    }

We will probably simply work this around by appending a qt version to the path... But it is still a bit annoying.

Regards,
Erik