The following is an article by an Eastern Rite Catholic which might be helpful:
"As a general rule, all Eastern Christians do not use the word "Purgatory." This includes both Eastern Catholic and Eastern Orthodox Christians. The word "Purgatory" is specific to the Latin tradition, and carries some specific historical baggage that makes Eastern Christians uncomfortable.
In the Medieval West, many popular theologians defined Purgatory as a specific place, where people essentially sat around and suffered. Some theologians went so far as to imply that a literal fire burns those who suffer in Purgatory. It was also popular to tally periods of time that people spent in purgatory for various offences. It is worth noting that contemporary
(emphasis mine) Roman Catholic theology has (thankfully) moved beyond this approach, to a more Patristic understanding of Purgatory.
In the Catholic understanding, only two points are necessary dogma concerning "purgatory": 1) There is a place of transition/transformation for those en-route to Heaven, and 2) prayer is efficacious for the dead who are in this state.
The Eastern Orthodox and Eastern Catholic Churches agree with the Latin Church fully on both of these points. In practice, we routinely celebrate Divine Liturgies for the dead, and offer numerous prayers on their behalf. We would not do so if we did not agree with the above two dogmatic points.
But again, we do not use the word "Purgatory" for two reasons. First, it is a Latin word first used in the Medieval West, and we use Greek words to describe our theology. Second, the word "Purgatory" still carries specific Medieval baggage that we aren't comfortable with."http://www.east2west.org/doctrine.htm
As can be seen from the article above, by a Catholic, the RCC has a "developing theology," so their position on Purgatory has changed over time. The Orthodox position regarding the subject has remained consistent. Also, the "baggage" he refers to is where we as Orthodox have most of our problems with the RCC view, namely indulgences (which then lead to the "Treasury of Merits" concept), and the idea of being punished for "venial sins". As so often has been the case, the RCC has taken something and altered the understanding of it in such a way that we cannot accept it. But since they have a belief in doctrinal development, there is no telling what their position on a subject will be down the road. The RCC of today is not the RCC of even 70 years ago. The prayers that we offer for the dead have nothing in common with indulgences. Orthodoxy is much more consistent.