Resolved! Installation of hotfixes or marketpace packages fails because of class "org.eclipse.core.runtime.MultiStatus"'s signer information
For instance, when I try to install the hotfix 7 for 5.6, I get an error message that says: Installation failed : class "org.eclipse.core.runtime.MultiStatus"'s signer information does not match signer information of other classes in the same packag...