An entry from the USIP changelog states:
v1.2.0 (2007-December-25)
Fixed bad UV mapping on the legs of both types of beds found in the Isles ( SEBed01.NIF & SEBed02.NIF )
However, the UV mapping on the legs of both types of beds with the USIP installed looks to be not right (see the attached image).
There is a mod called
Khettienna's Mini-Mods which somewhat fixes these two bed meshes (the KMM SE Beds Improved UV or KMM SE Beds Improved UV Stone miscellaneous files), and so maybe similar fixes could be replicated in the USIP.

Attached Files:
USIPBedLegMeshUV.jpg