Anyone know what this is, why it is occurring, and whether I should be concerned -

Code:
Retrieving repository 'KDE4 Factory Community' metadata [done]
Building repository 'KDE4 Factory Community' cache [done]
Digest verification failed for patterns.xml.gz. Expected cb582b288094d2a1dd09d39c3f5a8ee7551fe7ca, found 7f173202b6e9e2edab1e232e1cfea0c839bb8898. Continue? [yes/NO]:
Thanks .