Error when installing JBT from http://download.jboss.org/jbosstools/updates/nightly/core/trunk/.

Steps to reproduce:
0. Start with existing Eclipse 3.7.2 w/ JBT 3.3.0.Beta2 installed
1. Help > Install Software
2. Use update site http://download.jboss.org/jbosstools/updates/nightly/core/trunk/
3. Select All Available software
4. Choose next

Install dialog displays this error:

Cannot complete the install because of a conflicting dependency.
Software being installed: org.jboss.tools.common.verification.feature.source.feature.group 3.3.0.v20120429-1724-H873-CR1
Software currently installed: org.jboss.tools.common.all.feature.source.feature.group 3.3.0.v20120420-1954-H857-Beta3
Only one of the following can be installed at once:
org.jboss.tools.common.verification.feature.source.feature.jar 3.3.0.v20120420-1954-H857-Beta3
org.jboss.tools.common.verification.feature.source.feature.jar 3.3.0.v20120429-1724-H873-CR1
Cannot satisfy dependency:
From: org.jboss.tools.common.all.feature.source.feature.group 3.3.0.v20120420-1954-H857-Beta3
To: org.jboss.tools.common.verification.feature.source.feature.group [3.3.0.v20120420-1954-H857-Beta3]
Cannot satisfy dependency:
From: org.jboss.tools.common.verification.feature.source.feature.group 3.3.0.v20120420-1954-H857-Beta3
To: org.jboss.tools.common.verification.feature.source.feature.jar [3.3.0.v20120420-1954-H857-Beta3]
Cannot satisfy dependency:
From: org.jboss.tools.common.verification.feature.source.feature.group 3.3.0.v20120429-1724-H873-CR1
To: org.jboss.tools.common.verification.feature.source.feature.jar [3.3.0.v20120429-1724-H873-CR1]