Android browser on Xperia causes lag. Anyone else?

I have an Xperia Sola with ICS running. After months of investigating (including restarting the phone a couple of times) I found out that the phone is very smooth. Until you open the stock browser. Not only is browsing extremely slow (the keyboard takes ages to show up), even when out of it, the phone significantly lags, to a point where it is just laughable. The only way to solve the problem is close the browser (with the task manager). I also found out that Chrome and some other browsers caused the same problem, perhaps to a lesser extent. Only opera mini seemed to not cause an issue. Has anyone else (specially xperia users) had a similar experience? I know that the ICS update had upset many xperia users because of lagging more than Android 2.3.