Vista Wireless Connection Problems

Hello,

I've bought two brand new Acer Aspire 5102wlmi laptops with Vista
preinstalled.

Connection to my wireless network works fine, but once in while ( once every
~30 minutes) the connection disconnects and connects again, disabling my
internet. Both laptops suffer from this.

An other symptom of this problem is, while playing music in winamp/wmp small
"ticks" are audible, suggesting data loss.

My older laptop, running Windows XP, has no problems whatsoever. No ticks
(same music) and 100% connection time.

Any suggestion?

Specs laptop:
- Acer Aspire 5102wlmi
- Wireless-card: Atheros AR5005G, driver version 7.1.0.90 (latest version as
far as I know)
- IPv6 disabled
- Windows Vista Home Premium

Wireless:
802.11a/b/g/n, with WPA-personal TIPK encription.