We've installed the Novell Client 4.91 SP5 including the two recently
released patches and it's working fine. These days we had to add the MS
Windows Client and now the UNC calls aren't working anymore. For example:
\\NW_Server\SYS\PUBLIC isn't working anymore on 4.91 SP5, while it works
fine on SP4 with the MS Client.
When Novell will release a patch to resolve this issue?

Is there any possibility to downgrade to the 4.91 SP4 without uninstalling
the SP5 client?

Thank you for your help.