Anton, It seems that you are using JBoss Tools 3.3.0.M3 which is not compatible with Eclipse Helios. You have to install Eclipse Indigo which is supported be JBT 3.3 or if you cannot upgrade your Eclipse then please use JBT 3.2.
At work I use 32-bit Windows (XP) + Eclipse Helios and at home - 64-bit Windows 7 + Eclipse Indigo.
I use 3.3.0.M3 with Indigo.
The same for all prompts - including tags (after ':') and attributes. Pauses are too long. Java prompt works brilliantly...
Very strange, that no one has the same problems on 64-bit WIndows with Indigo...