For some time I can't see any markers on map when I'm outdoors, neither area entry points nor quest marker nor myself. Also, the map isn't centered on my position when I call it; sometimes it's hard to find the familiar area because the "fog of war". Inside cities and indoors everything is all right.

What could possibly cause this? Here's my list of mods:

Oblivion.esm
Jog_X_Mod.esm
Cobl Main.esm
Kvatch Rebuilt.esm
bookplacing.esm
All+5AttributeModifiers.esp
TNR ALL RACES FINAL.esp
Unofficial Oblivion Patch.esp
Oblivion Citadel Door Fix.esp
DLCShiveringIsles.esp
Unofficial Shivering Isles Patch.esp
Oblivion Vwalk UOS.esp
TNR ALL RACES FINAL Vwalk UOS.esp
Book Jackets Oblivion - BP.esp
RD-TimeKeeper-v1-3-2minUpdate.esp
Slof's Oblivion Pillow Book.esp
MaleBodyReplacerV4.esp
HentaiChinaDress.esp
Oonas_Outfitters.esp
JB Catsuit Variants.esp
Call Steed 2.5+Saddlebags 0.91.esp
SellHorses.esp
Cobl Glue.esp
Cobl Si.esp
eyja.esp
GwedenBrothel.esp
Kvatch Rebuilt.esp
Legion Faction Mod.esp
RomancingAhnassi.esp
thievery.esp
Harvest [Flora].esp
Book Placement v2.esp
Cliff_BetterLetters.esp
Slof's Dogs.esp
Quest Award Leveller.esp
CuteElf11.esp
1em_Vilja.esp
Bashed Patch, 0.esp
Betterleveledlists.esp
Oblivion Cats v0.2a.esp
TF_timemod1-1.esp
sk_Katanas.esp

I also use Darnified UI Addition - Map Filters mod for showing all names, but AFAIR the effect in question appeared not immediately after installing it but some time later.