hi i have a 12" rev b PB but in the past few days i have noticed that on the left wrist rest (above the hd) has been hotter than i heve ever felt it to be before. i have also noticed that the fan has been coming on far more often. thempertaure monitor showed that it was running as high as 58C when i was just on the internet, listening to music, nothing too strenuous last night. i know in the past few days it has been pretty hot outside (like mid to high 20's) but would it make that much of a difference? could this be a warning sign that something is wrong with my hd or laptop in particular?