Troubles with IP TV

[Lion32]

Hello folks!

When I updated my VLC player to version 1.0 my IP TV UDP streaming stopped working as it should.
I now deinstalled (removed all the settings) and installed 1.01.
When I open a stream f.e.
udp://@239.255.0.99:5002

it works ok, but then when I switch to a different channel (in my playlist) it get chunkier... and if I switch again it get even more... so with each switch it is worse....

if I then close VLC and reopen it right away it is stil chunky... but if I wait a few minutes it workes ok. But then again.. if I try to switch the channel it happens again.

any idea of what I should do?