EFF claims the new AOL Messenger scans all private IMs and stores them.

From The Electronic Frontier Foundation:

"The new preview version of AOL Instant Messenger raised privacy concerns for us when it was first introduced, first because it started storing more logs of communications and second, because it apparently scanned all private IMs for URLs and pre-fetched any URLs found in them. We met with AOL to discuss how these features work and why the company should take greater care with your data, and we’re happy to say that AOL is promising to make some important changes as a result, especially in response to our second concern.

However, we still recommend that AIM users do not switch to the new version, as it introduces important privacy-unfriendly features. Unfortunately, AOL's moves are in keeping with a general trend toward more pervasive cloud-based services in which your personal chat data is centrally stored in plain text and an easy target for law enforcement and criminals. This shift toward central logging is troubling in many situations, including in chat.

When you first sign into the new AIM, a flag is permanently set on your account to begin storing all of your conversations on AOL’s servers for up to two months, and perhaps indefinitely. AOL's intent is to make it easy to see the same messaging history even if you sign in from a different device, but the danger is that your private conversations are now available to, for instance, law enforcement agents with a warrant or a national security letter, or to criminals in the event of a data breach. In the case of government access AOL might not even be required (or allowed) to inform you that your private communications are no longer private. Because this concern will arise whenever your data is stored with cloud services or other kinds of third-party servers, EFF has long argued that whenever possible, no logs are good logs."

https://www.eff.org/deeplinks/2011/12/effs-raises-concerns-about-new-aol-instant-messenger-0