The properties of the AOP proxy should have a more "internal" name
The AOP proxy classes define several properties, e.g. $objectFactory. Now if you try to advice a class having defined one of these properties with the same name, but as static, this ends up in a fatal error.
Solution: Give these properties a name probably nobody else will use, like FLOW3_AOP_Proxy_objectFactory.
Are there any reasons this change would not work? If not, just assign this issue back to me and I will implement it.