On the last 2 servers  I have installed, the cron job is not running on either -- my other 3 that were installed pre - March 1 are fine
http://prntscr.com/x2hz6

Also I still do not get notifications of responses to my Centova forum posts

First of all, restart Centovacast (/etc/init.d/centovacast restart) and run /usr/local/centovacast/bin/ccmanage cronjob all --debug

Yes I have been doing that but it needs to automatically run

The point of doing the above is to find out why it's failing, not to perform a single invocation.  If it completes successfully, then it's very likely that something is wrong with your configuration of cron itself.  (Yes, that'd be unusual if it happens on 3 different servers, but it's possible.)

Centova Cast's cron jobs are configured in /etc/cron.d/centovacast.  Check the cron jobs listed in that file and make sure they're ALL showing up in /var/log/cron (or /var/log/messages if you're on Debian) at the correct intervals.

We *have* had reports of problems with CC's cron jobs, but two of the three clients who've reported it and insisted it was a CCv3 bug have provided their root login details to me personally, and I was able to log in and confirm that in both cases it was their own fault.  (The first, strangely, didn't even have cron installed, and the second had a broken cron configuration that was causing some jobs not to run.)

Also I still do not get notifications of responses to my Centova forum posts

Unfortunately I can't help with that -- the mail is definitely being delivered to your mail server.  I can't say what's happening to it beyond that point.  Here are the last few relevant entries from our internal and edge SMTP servers:

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Wed Mar 27 14:13:15 2013 mail[13505]: `10.10.1.130      Unknown mail.local.hosts        <noreply@centova.com>   <redacted@redacted.com>    "Topic reply: Build Announcements"      queued          <0aaa63355f079ef96cf7ae795ef9b8ad-m6670@centova.com>
Wed Mar 27 14:17:54 2013 mail[13654]: `10.10.1.130      Unknown mail.local.hosts        <noreply@centova.com>   <redacted@redacted.com>    "Topic reply: Backups"  queued          <53b9e7ce4bb13ba1423ef0f8968b1338-m6671@centova.com>
Wed Mar 27 20:34:20 2013 mail[30741]: `10.10.1.130      Unknown mail.local.hosts        <noreply@centova.com>   <redacted@redacted.com>    "Topic reply: Reindex doesn't work"     queued          <7250271777570ed31a360ae719060e3e-m6681@centova.com>
Wed Mar 27 21:02:51 2013 mail[2377]: `10.10.1.130       Unknown mail.local.hosts        <noreply@centova.com>   <redacted@redacted.com>    "Topic reply: Cron Job Not Running"     queued          <d0ba96adc02a59d7880ed2072f65c670-m6688@centova.com>

2013-03-27 14:13:16 1UKxel-0003Vq-13 => redacted@redacted.com R=dnslookup T=remote_smtp H=redacted.com [x.x.x.170] X=TLS1.0:RSA_AES_256_CBC_SHA1:32 DN="C=US,ST=Unknown,L=Unknown,O=Unknown,OU=Unknown,CN=server.redacted.com,EMAIL=ssl@server.redacted.com"
2013-03-27 14:13:16 1UKxel-0003Vq-13 Completed
--
2013-03-27 14:17:56 1UKxjG-0003YF-Ro => redacted@redacted.com R=dnslookup T=remote_smtp H=redacted.com [x.x.x.170] X=TLS1.0:RSA_AES_256_CBC_SHA1:32 DN="C=US,ST=Unknown,L=Unknown,O=Unknown,OU=Unknown,CN=server.redacted.com,EMAIL=ssl@server.redacted.com"
2013-03-27 14:17:56 1UKxjG-0003YF-Ro Completed
--
2013-03-27 20:34:22 1UL3bY-0007zq-Py => redacted@redacted.com R=dnslookup T=remote_smtp H=redacted.com [x.x.x.170] X=TLS1.0:RSA_AES_256_CBC_SHA1:32 DN="C=US,ST=Unknown,L=Unknown,O=Unknown,OU=Unknown,CN=server.redacted.com,EMAIL=ssl@server.redacted.com"
2013-03-27 20:34:22 1UL3bY-0007zq-Py Completed
--
2013-03-27 21:02:53 1UL439-0000cN-Uz => redacted@redacted.com R=dnslookup T=remote_smtp H=redacted.com [x.x.x.170] X=TLS1.0:RSA_AES_256_CBC_SHA1:32 DN="C=US,ST=Unknown,L=Unknown,O=Unknown,OU=Unknown,CN=server.redacted.com,EMAIL=ssl@server.redacted.com"
2013-03-27 21:02:53 1UL439-0000cN-Uz Completed
Obviously I've sanitized the above for your privacy but redacted@redacted.com is the address you've registered on the forums, and server.redacted.com is the hostname of your mail server.

Maybe check your spam folder?