iTunes, Cover Flow, and Memory Usage

I was scrolling through my iTunes using the Cover Flow, when a message pops up telling me iTunes will not be able to save because it's out of memory. I check the memory usage, it's 1.3 GB. I exited, loaded up iTunes again, and did a little checking. Under normal usage, it's around 25-40 MB, but as soon as I start scrolling through the album covers the usage begins shooting up. Scrolling through at the standard speed increases it by 50 MB every few seconds. Halfway through my albums, it's gone from 40 MB to 1 GB.

Is this normal, and if not, what's wrong?

 

I'm not entirely sure what's supposed to be normal running iTunes under Vista. I've visited the official iTunes forums a few times, and while some Vista users are apparantly getting perfectly normal performance and behaviour, I and several others anything but.

I can't even use cover flow on my Vista laptop - it stutters like mad and CPU use goes through the roof, like I was trying to run Crysis on full settings rather than flip through a few album covers.
Something as simple as scrolling through my music collection (just shown as simple text) causes severe CPU spikes and stuttering as well.

I don't see any excessive memory use though. I just tested it and it goes from around 35 MB without cover flow turned on, to around 150 MB when I've flipped through all covers (seems somewhat reasonable considering what it's loading), and it doesn't go higher.

 

Odd. I have no problems at all with normal usage (scrolling through songs, etc.), except for this one with Cover Flow. If I try to drag it quickly, it's not smooth, but I expected that. But why the memory is increasing so much, when yours isn't, is puzzling. The performance of my computer wasn't effected either, I wouldn't have noticed if it wasn't for the "can't save" message.