was working and doing tests on 5.3.0 before i could integrate it in my production servers, and while doing so i noticed some issues with cacheurl plugin and maybe other plugins but that i can not confirm.
Here is what my observation was :
in cacheurl.config i have
loaded cacheurl.so cacheurl.config in plugin.config
and i confirm that i get [Apr 18 02:45:54.442] Server
DIAG: (cacheurl) Adding pattern/replacement pair: 'http://s1.2mdn.net/viewad/4079501/BeitMisk_Spring_160x600_web.gif' -> 'http://tested/switched.gif'
which says that the pattern was added correctly
nevertheless when i do curl or wget with xdebug header request
i get :
meaning that the cacheurl plugin didn't actually do the mapping in any way possible
Next was testing with 5.2.1 version of ATS to see how things go so i git cloned it and compiled and ran the same test again
now i get
which means that cacheurl in 5.2.1 works while in latest mainstream or 5.3.0 it does not
i shall do further tests and feed you back here