Clutch Grinding in 2nd and 3rd

[Astrosfan]

On the way into work this week ive noticed a strange grinding feel and noise when shifting from 1-2 and 2-3 and maybe 3-4....

Its not the normal chatter we have all come accustomed to with our Zs. Its more of a grinding feel that i can feel in the clutch pedal itself. the best way i can describe it, is that it feels as if i can feel the gears contacting and grinding til they connect... I can feel all this on the clutch pedal......and I am pushing the clutch pedal past the engagement point..
This seems to only happen in the morning on the way to work. Has anyone else had this problem? Ive done some searching on this site and came up empty.

2009 370z 6mt sport with 49,000 miles - transmission fluid replaced by Nissan my last scheduled maintenance. This is my daily driver but i do drive it somewhat hard. Ive been driving a manual for about 15 years so i dont think its my driving thats causing the problem. I do ride the clutch on occasion but not more than the average.... ie, traffic

I have noticed the occasional clutch slippage between 3-4 when giving it all its got. but this happens sporadically.