I flashed my Samsung Galaxy Ace (GT-S5830) with the Cyanogenmod 7.2 release, the install went fine without any errors.
Powering the phone on shows a black screen with the word "ANDROID" in white, and it stays there. I left it alone for up to 30 minutes to humor the "may take up to 5 minutes" caveat.
I tried this answer without success (broken link to PDA zip, the one I googled is obviously incorrect). Looking into this issue more, this answer also yields broken links. (Seems a common issue for fast-paced firmware releases. . .)
I cannot seem to find a firmware for GT-S5830, which I could update via Odin. I can still power on into recovery mode, so installing from sd card is also possible, but I'm lost for what to install if the CMod did not work.
Edit: I had the phone reset by the store staff. I am a bit jaded that I could not install a nicer release on it, but hope to get this right next time!