Is there some special reason why the last two builds of 2.3.3 are not available in your Maven repository?
Last build is not available on Maven Repository
Just checked and 2.3.3_06 was indeed missing (but 2.3.3_05 was there).
It is available now (refresh your browser). I will check what went wrong. Thank you for reporting this.
ObjectDB - Fast Object Database for Java (JPA/JDO)