particle weapon ammo not researchable
Not true.
research topics such as alien origins, live aliens, portable beam thingie, lead to no further actions
Not true for all mentioned.
seems to be some confusion when you have multiple bases with research labs: on one base it indicates item not researchable, while on other base it shows it being researched
Some research topics needs item in base storage. If you have such item in base#1 but not in base#2, you can research it in base#1 but not in base#2.
after load saved games, need to readmit soldiers into hospital
That is already fixed in current trunk, I believe.
grenade launcher with frag shells does not work
Hmm, what do you mean here?