After replacing 3.1.2 jar files with 3.1.3GA jar files my application works
100 times slower. Page loading and navigation ( through clicks on rich tabs) takes ages...
This happens both in IE and FF and regardless number of components on the page.
Any ideas what I should look for ?
This is a side effect of the combination of script compression and caching.
The problem is solved in the upcoming 3.1.4
For the 3.1.3 you can follow the recommendation at