We found a problem uploading images larger than 64Mb - it turns out these images break the limit of the JMS broker that Aware IM uses. An attempt to upload such a file can completely kill the Aware IM server.
The latest build of version 8.0 (2346) addresses the problem. Now if you want to load images larger than 64Mb add the following line to your AwareIM/bin/BASServer.props and restart Aware IM:
JMS_BROKER_MEMORY=ValueInBytesOfTheLargestFile
for example:
JMS_BROKER_MEMORY=250000000