[TYPO3-Solr] 3.0.0 - error org.apache.solr.common.SolrException: Invalid Date String

[Jan Slusarczyk]

I have upgraded to version 3.0.0. Initially I've had tons of problems 
with java versions, tomcat6 and ubuntu. I think I have the config 
patched up properly, but indexing doesn't work. Now I get the following 
errors:

249548 [http-8080-2] INFO 
org.apache.solr.update.processor.LogUpdateProcessor  – [babyboom_pl] 
webapp=/solr path=/update params={wt=json} {} 0 1
249548 [http-8080-2] ERROR org.apache.solr.core.SolrCore  – 
org.apache.solr.common.SolrException: Invalid Date String:'1364207769'

I've tried to Google and all I get is that solr need to have date in a 
form of 2014-04-30T23:59:59Z

Any idea where this come from?

Regards
Jan