Frozen Suspension?

[Travis]

The last couple of days have been fairly cold on the prarie (+15 to -8-), and I have noticed the car isn't handling so well... It seemed to be kind of "bucking" on low speed streets this evening. My daily drive consists of 50 miles at 75 or 80 mph, then 5 miles of city driving. I don't have a garage, so I can't really find out if it's iced up, other than just looking underneath for a big block of ice which I didn't see.

Any Ideas?

[Travis]

Well, the problem seemed to repeat for a day or two, but since it warmed up (To 37 (F) or so) the problem seems to have gone away.