3dsmax keeps resetting my textures

[Scorpwanna]

I dunno if I'm accidently clicking the wrong thing, but every so often my textures seem to get reset to a default size. I set everything the way I like it, start building my map some working here and there, and later realize that my textures are screwed up again, it's hard to build a map when textures are setting you back. Has anyone else ever had this problem?