However, none of the "known issues" were my issue, as I used the OMOD, etc. etc.
If I knew where to get my load order I'd post it; however, what I've got installed is the DLC stuff, the unofficial patches, my custom race/body mod (so the character loads in), the Darnified Dark UI (I use a recolour so didn't want to redownload/recopy), and OOO. I did still run BOSS for posterity before loading in.
I tried OOO 1.33, I added the 1.33 patch (since it said I might not have the esp/esm with the OMOD version), then adding the 1.34 patch; in all cases, when I loaded in and opened an affected crate or barrel, I got the same magenta error.
So, the problem lies in OOO itself. I deactivated all my other miscellaneous mods (other than the ones I listed), and deactivated/uninstalled the other parts of FCOM, including Fran's, WarCry and MMM as well as the optionals such as COBL, Travelers etc.
Any ideas? I downloaded OOO omods from http://planetelderscrolls.gamespy.com/View.php?view=OblivionMods.Detail&id=3953. Maybe I'll try the TES link. =/
EDIT: I installed the full version of OOO.
EDIT EDIT: Here we go. Read up on Wrye Bash (I'd never used it before).
Masters for: autosave.ess00 Oblivion.esm01 Oscuro's_Oblivion_Overhaul.esm [Version 1.34]02 Unofficial Oblivion Patch.esp [Version 3.2.0]03 DLCShiveringIsles.esp04 Unofficial Shivering Isles Patch.esp [Version 1.4.0]05 DLCHorseArmor.esp06 DLCOrrery.esp07 DLCVileLair.esp08 DLCMehrunesRazor.esp09 DLCSpellTomes.esp0A DLCThievesDen.esp0B Oscuro's_Oblivion_Overhaul.esp [Version 1.34]0C OOO-Water_Weeds.esp [Version 1.33]0D DLCBattlehornCastle.esp0E DLCFrostcrag.esp0F Knights.esp10 Harvest [Flora].esp [Version 3.0.0]11 Harvest [Flora] - Shivering Isles.esp [Version 3.0.0]12 Harvest [Flora] - DLCVileLair.esp [Version 3.0.0]13 Harvest [Flora] - DLCFrostcrag.esp [Version 3.0.0]14 Chocolate Elves.esp15 KT_CustomRaceFix.esp16 DLCHorseArmor - Unofficial Patch.esp [Version 1.0.5]17 DLCOrrery - Unofficial Patch.esp [Version 1.0.3]18 DLCFrostcrag - Unofficial Patch.esp [Version 1.0.4]19 DLCThievesDen - Unofficial Patch.esp [Version 1.0.5]1A DLCThievesDen - Unofficial Patch - SSSB.esp [Version 1.0.4]1B DLCMehrunesRazor - Unofficial Patch.esp [Version 1.0.4]1C DLCVileLair - Unofficial Patch.esp [Version 1.0.5]1D DLCSpellTomes - Unofficial Patch.esp [Version 1.0.1]1E Knights - Unofficial Patch.esp [Version 1.0.9]1F DLCBattlehornCastle - Unofficial Patch.esp [Version 1.0.4]
EDIT EDIT EDIT: (:P)
I redownloaded and remade the OOO main file into an OMOD, and it works correctly now. Not sure what went weird the first time, but woo hoo! Now to add the rest of my FCOM stuff back. -trudges off-