Actually the issue is manifold let me elaborate in detail
1) My site had quite a few user-generated P 0 R N TAGS... and we used to get quite a high number of traffic through those tags, I 301-ed the tags to homepage. (this I had done when Panda update happened 22nd of last month)
2) I didn't 301-ed entire subdomain to homepage.... instead I 301-ed landing pages of subdomain to relevant landing pages of main index domain... (this i had around 1-2 months ago)
3) The most recent changes which I did, was I put canonical tags on duplicate products.
4) In short most of the 301 which is happening to homepage, is from landing pages of main domain itself and not from subdomain..... (P 0RN tags and other thin pages)... but still could this number have been high enough to have triggered this message or as pageoneresult put it...."the message not about redirects, its about backlink profile...and I should have a look at it....
Now given that I have received this messages,... what steps should I take to resolve the issue before filing for reconsideration?.... Should I ask every site owner who has linked to me to remove my link? That would be very cumbersome.... What would you guys do if you had received this message?