There is a radio tower east of Zvir, north of Pavlovo, and the ladder is glitched into the platform. I climbed the tower to locate a helicopter crash and tried to climb back down and my character would not move because of the ladder being stuck inside the platform. I tried going down normally, sliding down, getting off the ladder and back on, and when I got off the ladder my character glitched and fell down to the next platform below me and died.
Edit: I have tested various other radio towers around Chernarus, with varying results. Sometimes I get stuck for a second then clip down the ladder and can climb normal, other times it's just a visual bug, sometimes the platform doesn't allow me to go back down at all. Here is a list of other towers I have tested, and found them to be bugged. I will continue to update the list.
-Zvir radio tower.
-Dubovo/Chernogorsk radio tower.
-Skalisty Island radio tower.
-Radio tower west of Solnichniy, North side of Three Valleys
-Radio tower at Rog castle, north east of Elektrozavodsk
-Radio tower slightly north of Svetlojarsk
-Radio Tower Slightly North-East of Novodmitrovsk.
After Testing about half the towers on Chernarus I assume that every small radio tower structure has the same bugged ladder.
Bor radio tower.
Radio tower West of Kamenka, north of the Military checkpoint.
Krasnoe radio tower.
Krasnostav radio tower.