when i issue cache and info parameters in google its not showing any information about the domain which is http://itshumour.blogspot.com but when i check cache for inner pages i can see cached date is earliest 13 June. Does this mean google penalty ? Is there anyway to reverse it ? Though i am getting traffic via google and i can see the contents are also indexed via google, only info and cache is not showing anything for the domain ... what might have happened
nope penalty or something, its normal for google.. just keep on building links so bots will keep on indexing your site which helps to update cache page.
your homepage is not cached due to copied content which appears also in your posts. the best way to solve it is to make a static page of your homepage which will not show a preview of your posts.