Regression with RAR artifacts

2015-07-18 05:17:21,187-0500 INFO  [pxpool-1-thread-20] cstamas org.sonatype.nexus.tasks.ExpireCacheTask - Scheduled task (ExpireCacheTask) started :: Expiring caches for repository Central Proxy from path / and below.
2015-07-18 05:17:21,281-0500 INFO  [pxpool-1-thread-20] cstamas org.sonatype.nexus.tasks.ExpireCacheTask - Scheduled task (ExpireCacheTask) finished :: Expiring caches for repository Central Proxy from path / and below. (started 2015-07-18T05:17:21-05:00, runtime 0:00:00.094)
2015-07-18 05:17:21,301-0500 INFO  [pxpool-1-thread-20] cstamas org.sonatype.nexus.configuration.application.DefaultNexusConfiguration - Applying Nexus Configuration due to changes in [Scheduled Tasks] made by *TASK...
2015-07-18 05:18:07,304-0500 INFO  [qtp1066003783-89197] cstamas org.sonatype.nexus.proxy.maven.MavenFileTypeValidator - StorageFileItem central-proxy:/io/vertx/vertx-jca-adapter/3.0.0/vertx-jca-adapter-3.0.0.rar MIME-magic validation failed: expected MIME types: [application/java-archive], detected MIME types: [application/zip, application/octet-stream]
2015-07-18 05:18:07,304-0500 INFO  [qtp1066003783-89197] cstamas org.sonatype.nexus.proxy.repository.validator.DefaultFileTypeValidatorHub - File item central-proxy:/io/vertx/vertx-jca-adapter/3.0.0/vertx-jca-adapter-3.0.0.rar evaluated as INVALID during file type validation (validator=maven)
2015-07-18 05:18:07,304-0500 INFO  [qtp1066003783-89197] cstamas org.sonatype.nexus.proxy.maven.maven2.M2Repository - Proxied item central-proxy:/io/vertx/vertx-jca-adapter/3.0.0/vertx-jca-adapter-3.0.0.rar evaluated as INVALID during content validation (validator=filetypevalidator, sourceUrl=https://repo1.maven.org/maven2/io/vertx/vertx-jca-adapter/3.0.0/vertx-jca-adapter-3.0.0.rar)