I find this way easier to merge branches and less conflicts:
Copy trunk to a new branch, merge it with feature branch/s. When things done, merge the new branch back to the trunk. This technique is quite like the mercurial and git rebasing.
I used to merge whatever changs from trunk to feature branche/s. But later when I merged the feature branch back to trunk, some of the stuff from trunk would be merged back again to the trunk, which caused a lot of conflicts. There is a choise of reintegrate merge, but it didn't seem to work for me.
Does anyone do similiar subversion rebasing? I just started doing this recently, and haven't seen any side effects. Would this cause any unforseen problems?