Windows 7 & WPA2-PSK

Windows 7 seems to have problems with some of characters used in  WPA2-PSK keys (alias: WiFi Protected Access Pre-Shared Keys, or Personal Mode) — only alphanumeric characters are allowed.

Hopefully I come up with solution:
I put some "dummy" (any text) key in the configuration dialog and save my new your_profile_name. When the newly created profile is saved I can:

1. Run netsh (window's net shell)
2. Enter wlan to switch to wireless configuration mode
3. Type command: set profileparameter name="your_profile_name" keyMaterial="your_strong_and_complicated_key"
4. done :)

And reconnect to your_profile_name.