There has been an issue with the lingering effects of the siphon attacks glow on weapons when weapon swapping for the last couple patches - the glow from previous weapon stays after new weapon is swapped to. I believe this started the same time the new weapon caching stuff was implemented (remember when we would not see new weapon equipped right away when changing weapons, or old weapon would stay on our screen even though new one was equipped and friends could see the new weapons). It seems to only show on the users view (my team mates did not see this lingering glow, just the normal one on the weapon equipped), but this problem did reproduce on my friends character when he hopped on his NB character.

First example is the effect from sword/board after swapping to staff:
http://img.photobucket.com/albums/v55/xaraan/Screenshot_20140922_222237_zps46685a8e.png

Second is effect lingering from bow after swapping to staff:
http://img.photobucket.com/albums/v55/xaraan/Screenshot_20140922_222237_zps46685a8e.png

It's not tied to any specific weapons, though some weapon effects overlap and problem won't be noticable (like going from staff to 1h/shield - you'll see glow on sword, but not on shield, and really won't notice an issue).

Also: separate issue, but similar - the overall placement of the glow effect on the barbaric hand axe is off and hovers in air above it. This isn't tied to swapping, just the placement in general is off and needs correction. Or at least it was a month or so ago, I haven't run with it since then b/c it drove me crazy.