Originally Posted by Smersh
I went back to 2.3.4, since 2.3.6 more or less broke my wifi. Maybe Ice Cream Sandwich will fix this, but I'm not holding my breath - Google still has not been able to fix the clock synchronization bug they introduced with Gingerbread, so I no longer put much trust into their technical competence.
I have no problems with Wifi. Maybe check what channel or what band your wifi is on. I've noticed some issues on 5Ghz.