[Plugin: gPress] conflict with other plugin, Javascript broken

I have installed your plugin but the tab gPress Options only opens orange and gray menu tabs that I cannot click. Also, tabs on the left sidebar cannot be opened.
In the Opera error console I see a Javascript error.

JavaScript - https://mysite.com/wp-admin/admin.php?page=tpp_options_form

Uncaught exception: TypeError: 'f.disabled.concat' is not a function
Error thrown at line 10, column 353711 in <anonymous function: _tabify>(q) in https://ajax.googleapis.com/ajax/libs/jqueryui/1.7.3/jquery-ui.min.js:
    f.disabled=c.unique(f.disabled.concat(c.map(this.lis.filter(".ui-state-disabled"),function(s,o){return r.lis.index(s)}))).sort();
called from line 10, column 350276 in <anonymous function: _init>() in https://ajax.googleapis.com/ajax/libs/jqueryui/1.7.3/jquery-ui.min.js:
    this._tabify(true)
called from line 28, column 0 in <anonymous function: _createWidget>(a, c) in https://mysite.com/wp-content/plugins/gpress/gpress-admin/js/ui-customised.js?ver=3.0.1:
    this._init()
called from line 25, column 806 in <anonymous function>(h, g) in https://mysite.com/wp-content/plugins/gpress/gpress-admin/js/ui-customised.js?ver=3.0.1:
    arguments.length&&this._createWidget(h,g)
called from line 27, column 51 in <anonymous function>() in https://mysite.com/wp-content/plugins/gpress/gpress-admin/js/ui-customised.js?ver=3.0.1:
    b.data(this,a,new c(d,this))
called via Function.prototype.call() from line 29, column 866 in <anonymous function: each>(a, b, d) in https://ajax.googleapis.com/ajax/libs/jquery/1.4.2/jquery.min.js:
    var f,e=0,j=a.length,i=j===w||c.isFunction(a);
called from line 24, column 260 in <anonymous function: each>(a, b) in https://ajax.googleapis.com/ajax/libs/jquery/1.4.2/jquery.min.js:
    return c.each(this,a,b)
called from line 26, column 556 in <anonymous function>(d) in https://mysite.com/wp-content/plugins/gpress/gpress-admin/js/ui-customised.js?ver=3.0.1:
    e?this.each(function(){var g=b.data(this,a),i=g&&b.isFunction(g[d])?g[d].apply(g,f):g;if(i!==g&&i!==undefined){h=i;return false}}):this.each(function(){var g=
called from line 4, column 3 in <anonymous function>() in https://mysite.com/wp-admin/admin.php?page=tpp_options_form:
    jQuery('.tpp_form_container #tabs').tabs({
called from line 26, column 460 in <anonymous function: ready>() in https://ajax.googleapis.com/ajax/libs/jquery/1.4.2/jquery.min.js:
    a.call(s,c);

Ah, discovered now that it clashes with the plugin Use Google Libraries – after deactivating that one gPress shows the setup screen as supposed to do.
Can you please look into it? I really would like to reactivate the Google libraries for better speed. Use Google Libraries didn’t conflict with other of my plugins.
thank you!