Thanks Igor, I've been trying the 4.8.1355 beta for one week now and all memory problems with ashServ.exe seem to be fixed, I've been trying for hours without observing any raise in memory for this process. Only ashWebSv.exe seems to increase a bit, from 32MB to 54MB of VM in a few hours, but it doesn't seem to go higher, so this is not really a problem.
Thank you very much for the fix, guys, I'll now upgrade to 4.8.1356.
Jef