I have an 06 Ibanez SR300 DX with the P/J p/u's. Had it for a year now and I've notice everytime the the tempeture change's by 5-7 degree's I need to re-adjust the neck. Last time I re-adjust the neck it was 78 degree's outside, had the widow's open also. Now here in Jersey we're having a heat wave so I shut the window's and put the A/C on to 72. Now the neck bowed forward and when it get's warmer the neck bow's back. I need to ask...is this the norm for the Ibanez thin neck's?
This sure seem too sensitive to me! I've got a couple of basses that will change from summer to winter, but a few degrees? I don't think so. I even had my Conklin 7 string develop buzz from lack of relief going into summer, but otherwise it's completely stable. And my Ibby hasn't needed any adjustment since winter. (but it's a 6er) I had my Fender Jazz develop strangenesses in the neck when it was out in the truck in the middle of winter, but once it warmed up (in about 15 minutes) it was right back to normal with no tweaking by me.
I'm just thinking that you just happened to unluck out and got a less than stable neck. It happens.