mohammed, whats changed in the pr1.3 hildon desktop v140 and ur older package v138? the new version u provided is the patched pr1.3 version or the old version with a new version number?
Many (including me) were particularly annoyed with the introduction of the PR1.2 menu, which had slower (much slower) kinetic scrolling. Here's a modified hildon-desktop package which has this reversed, and includes all fixes post PR1.2 (call UI glitching etc...).