first time I booted a classic program after upgrading from 10.2.4-->10.2.5, after being told the classic system needed updating, I found my mouse (trackpad) arrow would disappear anywhere other than in the dock! Also, the program, (a fuji RAW file converter for their S2 digital camera), didn't recognize S2 raw files!! I had already used both my classic folders, both were "upgraded", as a work around, had same problem each time. I rebooted into a backup of 10.2.4, one classic folder was "downgraded", (complete with warning) and it's all working now.
So...anyone see an 10.2.5 - classic problem? Meanwhile, I'm staying in 10.2.4....Peter